[ci] ignore cached Xmake toolchains in release source checks

.dockerignore

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+**
+
+!.dockerignore
+!docker/
+!docker/linux-build/
+!docker/linux-build/**
+
+# Dependency manifests and local xmake package recipes are the only project
+# files needed while pre-warming the build image.
+!xmake.lua
+!apps/
+!apps/desktop/
+!apps/desktop/xmake/
+!apps/desktop/xmake/**
+!deps/thirdparty/
+!deps/thirdparty/**
+!deps/submodules/
+!deps/submodules/xmake.lua
+!deps/submodules/minirtc/
+!deps/submodules/minirtc/xmake.lua
+!deps/submodules/minirtc/thirdparty/
+!deps/submodules/minirtc/thirdparty/**

.gitattributes

@@ -0,0 +1,3 @@
+*.h   linguist-language=C++
+*.cpp linguist-language=C++
+*.lua linguist-language=Xmake

.github/ISSUE_TEMPLATE/问题反馈.md

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+---
+name: 问题反馈
+about: 请在此提交问题报告，以便持续优化产品。
+title: ''
+labels: bug
+assignees: kunkundi
+
+---
+
+**描述问题**
+清晰简洁地描述遇到的错误。
+
+**复现步骤**
+复现该问题的步骤：
+1. 前往 '...'
+2. 点击 '....'
+3. 出现错误
+
+**预期行为**
+清晰简洁地描述你期望发生的行为。
+
+**截图**
+如果适用，请添加截图以帮助说明问题。
+
+**桌面端信息（请填写以下内容）：**
+ - 操作系统: [例如 Windows 11]
+ - 版本: [例如 v1.1.10]
+
+**移动端信息（请填写以下内容）：**
+ - 设备: [例如 iPhone 17]
+ - 操作系统: [例如 iOS 26.1]
+ - 浏览器: [例如 系统浏览器、Safari]
+
+**补充信息**
+在此添加与问题相关的其他上下文内容。

.github/ISSUE_TEMPLATE/需求建议.md

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+---
+name: 需求建议
+about: 请在此提交功能需求或改进建议，以便后续迭代参考。
+title: ''
+labels: enhancement
+assignees: kunkundi
+
+---
+
+**功能/改进建议描述**
+清晰简洁地描述希望新增的功能或改进的内容。
+
+**使用场景 / 背景**
+说明该功能或改进的使用场景，以及解决后带来的价值。
+
+**预期效果**
+描述你认为最理想的功能表现或改进效果。
+
+**参考示例（可选）**
+提供类似功能截图、参考链接或其他说明，帮助更好理解需求。
+
+**优先级（可选）**
+- [ ] 高
+- [ ] 中
+- [ ] 低
+
+**补充信息（可选）**
+其他相关信息或特殊要求。

.github/scripts/test_update_version_manifest.py

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+"""Regression coverage for independent and combined release metadata."""
+
+import copy
+import json
+from pathlib import Path
+import subprocess
+import sys
+import tempfile
+import unittest
+
+import update_version_manifest as manifest
+
+
+class ManifestTest(unittest.TestCase):
+    def setUp(self):
+        temporary = tempfile.TemporaryDirectory(prefix="crossdesk-manifest-")
+        self.addCleanup(temporary.cleanup)
+        self.root = Path(temporary.name)
+        self.artifacts = self.root / "release"
+        self.artifacts.mkdir()
+        self.current = {
+            "version": "1.6.0-20260930", "latest_version": "1.6.0-20260930",
+            "releaseDate": "2026-09-30", "releaseNotes": "Desktop notes", "patch": 0,
+            "downloads": {"windows-x64": {"url": "https://downloads.crossdesk.cn/existing.exe"}},
+            "custom": {"keep": True},
+        }
+
+    def files(self, *names):
+        for path in self.artifacts.iterdir():
+            path.unlink()
+        for name in names:
+            (self.artifacts / name).write_bytes(b"release fixture")
+        return manifest.artifact_downloads(self.artifacts)
+
+    def merge(self, tag, downloads, current=None):
+        return manifest.merge_release(current or self.current, tag, tag, "Release notes", downloads)
+
+    def test_mobile_preserves_desktop_metadata_and_downloads(self):
+        downloads = self.files("crossdesk-android-arm64-unsigned-v1.6.0-20261002.apk")
+        original = copy.deepcopy(self.current)
+        result = self.merge("android-v1.6.0-20261002", downloads)
+        for key, value in original.items():
+            if key != "downloads":
+                self.assertEqual(result[key], value)
+        self.assertEqual(result["downloads"]["windows-x64"], original["downloads"]["windows-x64"])
+        self.assertEqual(result["downloads"]["android-arm64"]["url"],
+                         "https://downloads.crossdesk.cn/crossdesk-android-arm64-unsigned-v1.6.0-20261002.apk")
+        self.assertEqual(result["downloads"]["android-arm64"]["version"], "1.6.0-20261002")
+        self.assertEqual(result["downloads"]["android-arm64"]["releaseDate"], "2026-10-02")
+        self.assertNotIn("platforms", result)
+        self.assertEqual(self.current, original)
+
+    def test_sequential_platform_releases_retain_each_other(self):
+        for order in (("ios", "android"), ("android", "ios")):
+            result = copy.deepcopy(self.current)
+            for platform in order:
+                version, extension = ("0.0.2", "zip") if platform == "ios" else ("1.6.0", "apk")
+                downloads = self.files(f"crossdesk-{platform}-arm64-unsigned-v{version}-20261002.{extension}")
+                result = self.merge(f"{platform}-v{version}-20261002", downloads, result)
+            self.assertNotIn("platforms", result)
+            self.assertEqual(result["version"], self.current["version"])
+            self.assertTrue({"windows-x64", "ios-arm64", "android-arm64"} <= result["downloads"].keys())
+            self.assertEqual(result["downloads"]["ios-arm64"]["version"], "0.0.2-20261002")
+            self.assertEqual(result["downloads"]["android-arm64"]["version"], "1.6.0-20261002")
+
+    def test_combined_release_records_independent_mobile_versions(self):
+        downloads = self.files("crossdesk-win-x64-v1.6.1-20261002.exe",
+                               "crossdesk-win-x64-portable-v1.6.1-20261002.zip",
+                               "crossdesk-ios-arm64-unsigned-v0.0.2-20261002.zip",
+                               "crossdesk-android-arm64-unsigned-v1.6.0-20261002.apk")
+        result = self.merge("v1.6.1-20261002", downloads)
+        self.assertEqual(result["version"], "1.6.1-20261002")
+        self.assertEqual(result["downloads"]["ios-arm64"]["version"], "0.0.2-20261002")
+        self.assertEqual(result["downloads"]["android-arm64"]["version"], "1.6.0-20261002")
+        self.assertNotIn("platforms", result)
+
+    def test_obsolete_platforms_are_removed_on_any_release(self):
+        for tag, artifact in (
+            ("android-v1.6.0-20261002", "crossdesk-android-arm64-unsigned-v1.6.0-20261002.apk"),
+            ("v1.6.1-20261002", "crossdesk-win-x64-v1.6.1-20261002.exe"),
+        ):
+            downloads = self.files(artifact)
+            expected = self.merge(tag, downloads)
+            for obsolete in ({"ios": {"version": "0.0.1"}}, []):
+                current = {**copy.deepcopy(self.current), "platforms": obsolete}
+                original = copy.deepcopy(current)
+                self.assertEqual(self.merge(tag, downloads, current), expected)
+                self.assertEqual(current, original)
+
+    def test_mobile_tag_must_match_artifact_and_platform(self):
+        downloads = self.files("crossdesk-android-arm64-unsigned-v1.6.0-20261002.apk")
+        for tag in ("android-v1.7.0-20261002", "ios-v1.6.0-20261002"):
+            with self.assertRaises(ValueError):
+                self.merge(tag, downloads)
+
+    def test_signed_android_release_updates_existing_unsigned_download(self):
+        unsigned = self.files("crossdesk-android-arm64-unsigned-v1.6.0-20261002.apk")
+        current = self.merge("android-v1.6.0-20261002", unsigned)
+        signed = self.files("crossdesk-android-arm64-v1.6.0-20261002.apk")
+        result = self.merge("android-v1.6.0-20261002", signed, current)
+        self.assertEqual(result["downloads"]["android-arm64"]["url"],
+                         "https://downloads.crossdesk.cn/crossdesk-android-arm64-v1.6.0-20261002.apk")
+        self.assertEqual(result["version"], self.current["version"])
+        self.assertEqual(result["downloads"]["windows-x64"], self.current["downloads"]["windows-x64"])
+        self.assertNotIn("platforms", result)
+
+    def test_signed_android_is_preferred_when_release_retains_unsigned_apk(self):
+        downloads = self.files("crossdesk-android-arm64-unsigned-v1.6.0-20261002.apk",
+                               "crossdesk-android-arm64-v1.6.0-20261002.apk")
+        self.assertEqual(downloads["android-arm64"]["filename"],
+                         "crossdesk-android-arm64-v1.6.0-20261002.apk")
+        with self.assertRaises(ValueError):
+            self.files("crossdesk-android-arm64-unsigned-v1.6.0-20261001.apk",
+                       "crossdesk-android-arm64-v1.6.0-20261002.apk")
+
+    def test_invalid_current_manifest_is_rejected(self):
+        downloads = self.files("crossdesk-android-arm64-unsigned-v1.6.0-20261002.apk")
+        for current in ([], {}, {"downloads": []}):
+            with self.assertRaises(ValueError):
+                manifest.merge_release(current, "android-v1.6.0-20261002", "Android", "", downloads)
+
+    def test_missing_duplicate_and_invalid_artifacts_are_rejected(self):
+        for names in ((), ("crossdesk-android-arm64-unsigned-v1.6.0-20260230.apk",),
+                      ("crossdesk-android-arm64-unsigned-v1.6.0-20261001.apk",
+                       "crossdesk-android-arm64-unsigned-v1.6.0-20261002.apk")):
+            with self.assertRaises(ValueError):
+                self.files(*names)
+
+    def test_hotfix_version_and_date_formats(self):
+        for value in ("v1.6.0-2-20261002", "v1.6.0-20261002-2"):
+            info = manifest.version_info(value)
+            self.assertEqual(info["patch"], 2)
+            self.assertEqual(info["releaseDate"], "2026-10-02")
+
+    def test_cli_preserves_literal_notes_and_release_metadata(self):
+        self.files("crossdesk-win-x64-v1.6.1-20261002.exe")
+        notes = '中文 release notes\n"quoted" $(not-a-command) $HOME `literal`'
+        release = {"tagName": "v1.6.1-20261002", "name": "Desktop release", "body": notes}
+        (self.root / "current.json").write_text(json.dumps(self.current))
+        (self.root / "release.json").write_text(json.dumps(release))
+        output = self.root / "version.json"
+        subprocess.run([sys.executable, str(Path(manifest.__file__)),
+                        "--current", str(self.root / "current.json"), "--output", str(output),
+                        "--artifacts", str(self.artifacts), "--release-json", str(self.root / "release.json")],
+                       check=True, capture_output=True, text=True)
+        result = json.loads(output.read_text())
+        self.assertEqual(result["releaseNotes"], notes)
+        self.assertEqual(result["releaseName"], "Desktop release")
+        self.assertEqual(result["tagName"], "v1.6.1-20261002")
+        self.assertNotIn("platforms", result)
+
+
+if __name__ == "__main__":
+    unittest.main()

.github/scripts/update_version_manifest.py

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+#!/usr/bin/env python3
+"""Merge a release's server downloads into the shared version.json."""
+
+import argparse
+import datetime
+import json
+from pathlib import Path
+import re
+
+
+DOWNLOAD_BASE = "https://downloads.crossdesk.cn/"
+ARTIFACTS = {
+    "windows-x64": ("win-x64", "exe"),
+    "windows-x64-portable": ("win-x64-portable", "zip"),
+    "macos-x64": ("macos-x64", "pkg"),
+    "macos-arm64": ("macos-arm64", "pkg"),
+    "linux-amd64": ("linux-amd64", "deb"),
+    "linux-arm64": ("linux-arm64", "deb"),
+    "ios-arm64": ("ios-arm64-unsigned", "zip"),
+    "android-arm64": ("android-arm64(?:-unsigned)?", "apk"),
+}
+
+
+def version_info(version, fallback_date=None):
+    version = version.removeprefix("v")
+    base = r"[0-9]+(?:\.[0-9]+){1,3}"
+    for pattern in (
+        rf"(?P<base>{base})-(?P<patch>[0-9]+)-(?P<date>[0-9]{{8}})",
+        rf"(?P<base>{base})-(?P<date>[0-9]{{8}})(?:-(?P<patch>[0-9]+))?",
+        rf"(?P<base>{base})(?:-(?P<patch>[0-9]+))?",
+    ):
+        match = re.fullmatch(pattern, version)
+        if match:
+            fields = match.groupdict()
+            date = fields.get("date")
+            release_date = (datetime.datetime.strptime(date, "%Y%m%d").date().isoformat()
+                            if date else fallback_date)
+            if not release_date:
+                raise ValueError(f"Release date is missing for {version}")
+            datetime.date.fromisoformat(release_date)
+            return {"latest_version": version, "version": version,
+                    "releaseDate": release_date, "patch": int(fields.get("patch") or 0)}
+    raise ValueError(f"Invalid release version: {version}")
+
+
+def artifact_downloads(directory):
+    downloads = {}
+    for path in sorted(Path(directory).iterdir()):
+        if not path.is_file():
+            continue
+        for key, (prefix, extension) in ARTIFACTS.items():
+            match = re.fullmatch(rf"crossdesk-{prefix}-v([0-9][0-9.\-]*)\.{extension}", path.name)
+            if not match:
+                continue
+            metadata = version_info(match[1])
+            if key in downloads:
+                previous = downloads[key]
+                if (key != "android-arm64" or previous["version"] != metadata["version"]
+                        or ("-unsigned-" in previous["filename"]) == ("-unsigned-" in path.name)):
+                    raise ValueError(f"Multiple release artifacts for {key}")
+                # Older releases may retain their unsigned APK after adding a signed one.
+                if "-unsigned-" in path.name:
+                    continue
+            downloads[key] = {"url": DOWNLOAD_BASE + path.name, "filename": path.name,
+                              "version": metadata["version"], "releaseDate": metadata["releaseDate"]}
+            break
+    if not downloads:
+        raise ValueError("No supported release artifacts found")
+    return downloads
+
+
+def merge_release(current, tag, name, notes, downloads, published_date=None):
+    if not isinstance(current, dict) or not isinstance(current.get("downloads"), dict):
+        raise ValueError("Current version.json must contain a downloads object")
+    mobile = re.fullmatch(r"(ios|android)-(v.+)", tag)
+    if mobile:
+        platform, version = mobile.groups()
+        expected_key = f"{platform}-arm64"
+        if set(downloads) != {expected_key}:
+            raise ValueError(f"{tag} must contain only the {expected_key} release artifact")
+        metadata = version_info(version, published_date)
+        if downloads[expected_key]["version"] != metadata["version"]:
+            raise ValueError("Mobile source tag does not match the artifact version")
+    else:
+        if not tag.startswith("v"):
+            raise ValueError(f"Expected a version tag, got {tag!r}")
+        metadata = version_info(tag, published_date)
+
+    result = dict(current)
+    result.pop("platforms", None)
+    result["downloads"] = {**current["downloads"], **downloads}
+    if not mobile:
+        result.update({**metadata, "releaseName": name, "releaseNotes": notes, "tagName": tag})
+    return result
+
+
+def main():
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("--current", required=True, type=Path)
+    parser.add_argument("--output", required=True, type=Path)
+    parser.add_argument("--artifacts", required=True, type=Path)
+    parser.add_argument("--tag")
+    parser.add_argument("--name")
+    parser.add_argument("--notes", type=Path)
+    parser.add_argument("--release-json", type=Path)
+    args = parser.parse_args()
+    if args.release_json:
+        release = json.loads(args.release_json.read_text())
+        tag = release["tagName"]
+        name = release.get("name") or tag
+        notes = release.get("body") or ""
+        published_date = (release.get("publishedAt") or "").split("T")[0] or None
+    else:
+        if not args.tag or not args.name or not args.notes:
+            parser.error("Supply --release-json or --tag, --name and --notes")
+        tag, name, notes = args.tag, args.name, args.notes.read_text()
+        published_date = None
+    current = json.loads(args.current.read_text())
+    downloads = artifact_downloads(args.artifacts)
+    result = merge_release(current, tag, name, notes, downloads, published_date)
+    args.output.write_text(json.dumps(result, ensure_ascii=False, indent=2) + "\n")
+    print(f"Updated {tag}: {', '.join(downloads)}")
+
+
+if __name__ == "__main__":
+    main()

.github/workflows/build-android.yml

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+name: Build Android
+
+on:
+  workflow_dispatch:
+  workflow_call:
+    inputs:
+      source_tag:
+        description: "Existing source tag for a standalone Android release."
+        required: false
+        type: string
+        default: ""
+    outputs:
+      version:
+        description: "Independent Android version and build date."
+        value: ${{ jobs.build.outputs.version }}
+  pull_request:
+    paths:
+      - ".github/workflows/build-android.yml"
+      - ".github/workflows/build.yml"
+      - ".github/workflows/release-mobile.yml"
+      - ".github/workflows/sign-android.yml"
+      - ".gitmodules"
+      - "LICENSE"
+      - "PRIVACY.md"
+      - "apps/android/**"
+      - "apps/ios/CrossDeskMobile/Resources/ThirdPartyLicenses.json"
+      - "apps/ios/licenses/**"
+      - "apps/ios/scripts/generate_third_party_licenses.py"
+      - "deps/submodules/minirtc"
+      - "libs/wire/**"
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    name: Build on Android (arm64)
+    runs-on: ubuntu-24.04
+    timeout-minutes: 120
+    outputs:
+      version: ${{ steps.package.outputs.version }}
+    env:
+      XMAKE_VERSION: "3.1.1"
+      CROSSDESK_SOURCE_TAG: ${{ inputs.source_tag || '' }}
+      CROSSDESK_RELEASE_BUILD: ${{ inputs.source_tag && 'YES' || 'NO' }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+          ref: ${{ inputs.source_tag || github.ref }}
+          submodules: recursive
+          persist-credentials: false
+
+      - name: Set up Java
+        uses: actions/setup-java@v5
+        with:
+          distribution: temurin
+          java-version: "17"
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: "3.13"
+          cache: pip
+          # Python build dependencies are declared in this workflow. This file
+          # also exists when source_tag checks out an older Android release.
+          cache-dependency-path: .github/workflows/build-android.yml
+
+      - name: Install native build tools
+        run: |
+          crossdesk_missing_packages=()
+          for crossdesk_package in build-essential cmake ninja-build pkg-config autoconf automake libtool nasm; do
+            if [[ "$(dpkg-query -W -f='${Status}' "${crossdesk_package}" 2>/dev/null || true)" != "install ok installed" ]]; then
+              crossdesk_missing_packages+=("${crossdesk_package}")
+            fi
+          done
+          if (( ${#crossdesk_missing_packages[@]} )); then
+            sudo apt-get update
+            sudo apt-get install -y --no-install-recommends "${crossdesk_missing_packages[@]}"
+          fi
+          python3 -m pip install setuptools wheel
+
+      # Use an isolated SDK directory so the cache contains only this toolchain,
+      # rather than every SDK/NDK version preinstalled on the runner.
+      - name: Select Android SDK directory
+        run: |
+          echo "ANDROID_HOME=${RUNNER_TEMP}/crossdesk-android-sdk" >> "${GITHUB_ENV}"
+          echo "ANDROID_SDK_ROOT=${RUNNER_TEMP}/crossdesk-android-sdk" >> "${GITHUB_ENV}"
+
+      - name: Restore Android SDK
+        id: android-sdk-cache
+        uses: actions/cache/restore@v5
+        with:
+          path: ${{ env.ANDROID_HOME }}
+          key: ${{ runner.os }}-${{ runner.arch }}-ubuntu24.04-android-sdk-v1-cli12266719-api36-build36.0.0-ndk28.2.13676358
+
+      - name: Set up Android SDK
+        if: steps.android-sdk-cache.outputs.cache-hit != 'true'
+        uses: android-actions/setup-android@v3
+        with:
+          cmdline-tools-version: "12266719"
+          log-accepted-android-sdk-licenses: false
+          packages: "platform-tools platforms;android-36 build-tools;36.0.0 ndk;28.2.13676358"
+
+      # Save immediately after installation, even if a later APK build fails.
+      - name: Save Android SDK
+        if: steps.android-sdk-cache.outputs.cache-hit != 'true'
+        uses: actions/cache/save@v5
+        with:
+          path: ${{ env.ANDROID_HOME }}
+          key: ${{ steps.android-sdk-cache.outputs.cache-primary-key }}
+
+      - name: Add Android tools to PATH
+        run: |
+          echo "${ANDROID_HOME}/cmdline-tools/16.0/bin" >> "${GITHUB_PATH}"
+          echo "${ANDROID_HOME}/platform-tools" >> "${GITHUB_PATH}"
+
+      - name: Install xmake
+        uses: xmake-io/github-action-setup-xmake@v1
+        with:
+          xmake-version: ${{ env.XMAKE_VERSION }}
+          actions-cache-folder: .xmake-toolchain-cache
+          actions-cache-key: ${{ runner.os }}-${{ runner.arch }}-ubuntu24.04-android-xmake${{ env.XMAKE_VERSION }}
+
+      - name: Cache Xmake package repository
+        uses: actions/cache@v5
+        with:
+          path: apps/android/.native/global/.xmake/repositories/xmake-repo
+          key: ${{ runner.os }}-${{ runner.arch }}-android-xmake-repo-v1-${{ hashFiles('apps/android/scripts/build_native.py') }}
+
+      # Cache installed packages only. build_native.py checks Xmake 3.1.1 and pins
+      # its own package repository; never reuse another platform's build/config.
+      - name: Cache native dependencies
+        uses: actions/cache@v5
+        with:
+          path: apps/android/.native/packages
+          key: ${{ runner.os }}-${{ runner.arch }}-android-arm64-native-v1-${{ hashFiles('apps/android/scripts/build_native.py', 'apps/android/native/xmake.lua', 'deps/submodules/minirtc/xmake.lua', 'deps/submodules/minirtc/thirdparty/**') }}
+
+      - name: Set up Gradle
+        uses: gradle/actions/setup-gradle@v6
+        with:
+          cache-provider: basic
+          cache-read-only: ${{ github.event_name == 'pull_request' }}
+
+      - name: Verify shared license catalog
+        run: python3 -B apps/ios/scripts/generate_third_party_licenses.py
+
+      - name: Build APKs and run Lint
+        working-directory: apps/android
+        run: |
+          ./gradlew --no-daemon --stacktrace \
+            :app:assembleDebug :app:assembleRelease :app:assembleDebugAndroidTest \
+            :app:lintDebug :app:lintRelease
+
+      - name: Verify APKs and native protocol
+        working-directory: apps/android
+        run: |
+          python3 -B test/verify_apk.py app/build/outputs/apk/debug/app-debug.apk
+          python3 -B test/verify_apk.py app/build/outputs/apk/release/app-release-unsigned.apk
+          python3 -B test/run_native.py
+          "${ANDROID_HOME}/build-tools/36.0.0/apksigner" verify app/build/outputs/apk/debug/app-debug.apk
+          "${ANDROID_HOME}/build-tools/36.0.0/apksigner" verify app/build/outputs/apk/androidTest/debug/app-debug-androidTest.apk
+
+      - name: Package APKs with the independent Android version
+        id: package
+        shell: python
+        run: |
+          import datetime
+          import json
+          import os
+          from pathlib import Path
+          import re
+          import shutil
+          from zoneinfo import ZoneInfo
+
+          apk_dir = Path("apps/android/app/build/outputs/apk")
+          metadata = json.loads((apk_dir / "release/output-metadata.json").read_text())
+          version = metadata["elements"][0]["versionName"]
+          if not re.fullmatch(r"[0-9]+\.[0-9]+\.[0-9]+", version):
+              raise ValueError(f"Invalid Android version: {version!r}")
+          build_date = datetime.datetime.now(ZoneInfo("Asia/Shanghai")).strftime("%Y%m%d")
+          # Match the dated release tags used by the desktop and iOS jobs.
+          tag = os.environ.get("CROSSDESK_SOURCE_TAG")
+          if not tag and os.environ["GITHUB_REF_TYPE"] == "tag":
+              tag = os.environ["GITHUB_REF_NAME"]
+          if tag:
+              tag = tag.removeprefix("android-")
+              match = re.fullmatch(r"v?[0-9]+(?:\.[0-9]+){1,3}-(?:[0-9]+-)?([0-9]{8})(?:-[0-9]+)?", tag)
+              if match:
+                  build_date = match[1]
+                  datetime.datetime.strptime(build_date, "%Y%m%d")
+          version = f"v{version}-{build_date}"
+          source_tag = os.environ.get("CROSSDESK_SOURCE_TAG", "")
+          if source_tag.startswith("android-v") and source_tag.removeprefix("android-") != version:
+              raise ValueError(f"Android source tag does not match the app version: {source_tag} vs {version}")
+          output = Path(os.environ["RUNNER_TEMP"]) / "crossdesk-android"
+          for variant, source in (
+              ("unsigned", "release/app-release-unsigned.apk"),
+              ("debug", "debug/app-debug.apk"),
+              ("debug", "androidTest/debug/app-debug-androidTest.apk"),
+          ):
+              destination = output / variant
+              destination.mkdir(parents=True, exist_ok=True)
+              suffix = "-test" if "androidTest/" in source else ""
+              shutil.copyfile(apk_dir / source, destination / f"crossdesk-android-arm64-{variant}-{version}{suffix}.apk")
+          with open(os.environ["GITHUB_OUTPUT"], "a") as stream:
+              stream.write(f"version={version}\n")
+          with open(os.environ["GITHUB_STEP_SUMMARY"], "a") as stream:
+              stream.write(f"Android {version}: arm64, API 26+, 16 KB aligned.\n\n"
+                           "Debug APK uses an ephemeral CI debug key; it is for testing and may require uninstalling an existing build. "
+                           "The Release APK is unsigned and needs your own signing before installation.\n\n"
+                           "Lint, native protocol/frame tests and APK checks passed. Device tests were compiled, not executed.\n")
+
+      - name: Upload unsigned Release APK
+        uses: actions/upload-artifact@v6
+        with:
+          name: crossdesk-android-arm64-unsigned-${{ steps.package.outputs.version }}
+          path: ${{ runner.temp }}/crossdesk-android/unsigned/*.apk
+          if-no-files-found: error
+
+      - name: Upload Debug and device test APKs
+        uses: actions/upload-artifact@v6
+        with:
+          name: crossdesk-android-arm64-debug-${{ steps.package.outputs.version }}
+          path: ${{ runner.temp }}/crossdesk-android/debug/*.apk
+          if-no-files-found: error
+          retention-days: 14
+
+      - name: Upload Lint reports
+        if: ${{ !cancelled() }}
+        uses: actions/upload-artifact@v6
+        with:
+          name: crossdesk-android-reports
+          path: apps/android/app/build/reports/
+          if-no-files-found: ignore
+          retention-days: 14

.github/workflows/build-ios.yml

@@ -0,0 +1,271 @@
+name: Build iOS
+
+on:
+  workflow_dispatch:
+    inputs:
+      patch:
+        description: "Optional patch number, matching the main build workflow."
+        required: false
+        type: string
+        default: "0"
+  workflow_call:
+    inputs:
+      source_tag:
+        description: "Existing source tag for a standalone iOS release."
+        required: false
+        type: string
+        default: ""
+      patch:
+        description: "Optional patch number from the main build workflow."
+        required: false
+        type: string
+        default: "0"
+    outputs:
+      version:
+        description: "Independent iOS version and build date."
+        value: ${{ jobs.build.outputs.version }}
+  pull_request:
+    paths:
+      - ".github/workflows/build-ios.yml"
+      - ".github/workflows/build.yml"
+      - ".github/workflows/release-mobile.yml"
+      - ".gitmodules"
+      - "LICENSE"
+      - "apps/ios/**"
+      - "deps/submodules/minirtc"
+      - "libs/wire/**"
+      - "xmake.lua"
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    name: Build on iOS (arm64)
+    runs-on: macos-26
+    timeout-minutes: 120
+    outputs:
+      version: ${{ steps.ios_version.outputs.version }}
+    env:
+      GITHUB_TOKEN: ${{ github.token }}
+      CROSSDESK_SOURCE_TAG: ${{ inputs.source_tag || '' }}
+      IOS_DEPLOYMENT_TARGET: "16.0"
+      EXPECTED_IOS_SDK: "26.5"
+      XMAKE_VERSION: "3.1.1"
+      XMAKE_REPO_REVISION: "121109352da272cd1a3d4ed52f2dcda34f839955"
+
+    steps:
+      - name: Extract version number
+        shell: bash
+        env:
+          PATCH_NUMBER: ${{ inputs.patch || '0' }}
+        run: |
+          VERSION_REF="${CROSSDESK_SOURCE_TAG:-${GITHUB_REF##*/}}"
+          VERSION_REF="${VERSION_REF#ios-}"
+          VERSION_BASE="${VERSION_REF#v}"
+          BUILD_DATE=$(TZ=Asia/Shanghai date +%Y%m%d)
+
+          if [[ ! "${PATCH_NUMBER}" =~ ^[0-9]+$ ]]; then
+            PATCH_NUMBER=0
+          fi
+
+          if [[ "${VERSION_BASE}" =~ ^([0-9]+(\.[0-9]+){1,3})-([0-9]+)-([0-9]{8})$ ]]; then
+            VERSION_BASE="${BASH_REMATCH[1]}"
+            PATCH_NUMBER="${BASH_REMATCH[3]}"
+            BUILD_DATE="${BASH_REMATCH[4]}"
+          elif [[ "${VERSION_BASE}" =~ ^([0-9]+(\.[0-9]+){1,3})-([0-9]{8})-([0-9]+)$ ]]; then
+            VERSION_BASE="${BASH_REMATCH[1]}"
+            BUILD_DATE="${BASH_REMATCH[3]}"
+            PATCH_NUMBER="${BASH_REMATCH[4]}"
+          elif [[ "${VERSION_BASE}" =~ ^([0-9]+(\.[0-9]+){1,3})-([0-9]{8})$ ]]; then
+            VERSION_BASE="${BASH_REMATCH[1]}"
+            BUILD_DATE="${BASH_REMATCH[3]}"
+          elif [[ "${VERSION_BASE}" =~ ^([0-9]+(\.[0-9]+){1,3})-([0-9]+)$ && "${PATCH_NUMBER}" == "0" ]]; then
+            VERSION_BASE="${BASH_REMATCH[1]}"
+            PATCH_NUMBER="${BASH_REMATCH[3]}"
+          fi
+
+          if [[ "${PATCH_NUMBER}" != "0" ]]; then
+            VERSION_NUM="v${VERSION_BASE}-${PATCH_NUMBER}-${BUILD_DATE}"
+          else
+            VERSION_NUM="v${VERSION_BASE}-${BUILD_DATE}"
+          fi
+
+          echo "VERSION_NUM=${VERSION_NUM}" >> "${GITHUB_ENV}"
+          echo "VERSION_NUM=${VERSION_NUM}"
+
+      - name: Select Xcode 26.6
+        shell: bash
+        run: |
+          sudo xcode-select -s /Applications/Xcode_26.6.app/Contents/Developer
+          xcodebuild -version
+          SDK_VERSION="$(xcrun --sdk iphoneos --show-sdk-version)"
+          if [[ "${SDK_VERSION}" != "${EXPECTED_IOS_SDK}" ]]; then
+            echo "Unexpected iOS SDK: expected ${EXPECTED_IOS_SDK}, got ${SDK_VERSION}" >&2
+            exit 1
+          fi
+
+      - name: Checkout code
+        uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+          ref: ${{ inputs.source_tag || github.ref }}
+
+      - name: Select corresponding source tag
+        shell: bash
+        run: |
+          if [[ -n "${CROSSDESK_SOURCE_TAG}" ]]; then
+            echo "CROSSDESK_RELEASE_BUILD=YES" >> "${GITHUB_ENV}"
+          elif [[ "${GITHUB_REF_TYPE}" == "tag" ]]; then
+            echo "CROSSDESK_SOURCE_TAG=${GITHUB_REF_NAME}" >> "${GITHUB_ENV}"
+            echo "CROSSDESK_RELEASE_BUILD=YES" >> "${GITHUB_ENV}"
+          fi
+
+      - name: Read independent iOS version
+        id: ios_version
+        shell: bash
+        run: |
+          IOS_VERSION_BASE="$(xcodebuild \
+            -project apps/ios/CrossDeskMobile.xcodeproj \
+            -scheme CrossDeskMobile \
+            -configuration Release \
+            -destination 'generic/platform=iOS' \
+            -showBuildSettings CODE_SIGNING_ALLOWED=NO | \
+            awk '$1 == "MARKETING_VERSION" && $2 == "=" { print $3 }')"
+          if [[ ! "${IOS_VERSION_BASE}" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+            echo "Invalid iOS marketing version: ${IOS_VERSION_BASE}" >&2
+            exit 1
+          fi
+          VERSION_NUM="v${IOS_VERSION_BASE}-${VERSION_NUM##*-}"
+          if [[ "${CROSSDESK_SOURCE_TAG}" == ios-v* && "${CROSSDESK_SOURCE_TAG#ios-}" != "${VERSION_NUM}" ]]; then
+            echo "iOS source tag does not match the app version: ${CROSSDESK_SOURCE_TAG} vs ${VERSION_NUM}" >&2
+            exit 1
+          fi
+          echo "IOS_VERSION_BASE=${IOS_VERSION_BASE}" >> "${GITHUB_ENV}"
+          echo "VERSION_NUM=${VERSION_NUM}" >> "${GITHUB_ENV}"
+          echo "version=${VERSION_NUM}" >> "${GITHUB_OUTPUT}"
+
+      - name: Initialize submodules
+        run: git submodule update --init --recursive
+
+      - name: Cache xmake dependencies
+        uses: actions/cache@v5
+        with:
+          path: apps/ios/.xmake/packages
+          key: "${{ runner.os }}-xmake${{ env.XMAKE_VERSION }}-deps-ios-arm64-source-v1-xcode26.6-xrepo1211093-min16-${{ github.run_id }}"
+          restore-keys: |
+            ${{ runner.os }}-xmake${{ env.XMAKE_VERSION }}-deps-ios-arm64-source-v1-xcode26.6-xrepo1211093-min16-
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: "3.13"
+
+      - name: Verify iOS license catalog
+        run: |
+          python3 -B -m unittest discover -s apps/ios/tests -p 'third_party_licenses_test.py' -v
+          python3 -B apps/ios/scripts/generate_third_party_licenses.py
+
+      - name: Verify iOS privacy controls
+        run: python3 -B -m unittest discover -s apps/ios/tests -p 'privacy_controls_test.py' -v
+
+      - name: Install xmake
+        uses: xmake-io/github-action-setup-xmake@v1
+        with:
+          xmake-version: "${{ env.XMAKE_VERSION }}"
+
+      - name: Verify xmake version
+        shell: bash
+        run: |
+          XMAKE_VERSION_OUTPUT="$(xmake --version)"
+          echo "${XMAKE_VERSION_OUTPUT}"
+          if [[ "${XMAKE_VERSION_OUTPUT}" != *"xmake v${XMAKE_VERSION}"* ]]; then
+            echo "Unexpected xmake version: expected ${XMAKE_VERSION}" >&2
+            exit 1
+          fi
+
+      - name: Pin xmake package repository
+        shell: bash
+        run: |
+          xmake repo -u
+          XMAKE_REPO_DIR="${HOME}/.xmake/repositories/xmake-repo"
+          git -C "${XMAKE_REPO_DIR}" fetch --depth=1 origin "${XMAKE_REPO_REVISION}"
+          git -C "${XMAKE_REPO_DIR}" checkout --detach "${XMAKE_REPO_REVISION}"
+          test "$(git -C "${XMAKE_REPO_DIR}" rev-parse HEAD)" = "${XMAKE_REPO_REVISION}"
+
+      - name: Build CrossDesk Mobile
+        shell: bash
+        run: |
+          DERIVED_DATA="${RUNNER_TEMP}/CrossDeskMobileDerivedData"
+          echo "DERIVED_DATA=${DERIVED_DATA}" >> "${GITHUB_ENV}"
+          xcodebuild \
+            -project apps/ios/CrossDeskMobile.xcodeproj \
+            -scheme CrossDeskMobile \
+            -configuration Release \
+            -destination 'generic/platform=iOS' \
+            -derivedDataPath "${DERIVED_DATA}" \
+            CODE_SIGNING_ALLOWED=NO \
+            CODE_SIGNING_REQUIRED=NO \
+            COMPILER_INDEX_STORE_ENABLE=NO \
+            IPHONEOS_DEPLOYMENT_TARGET="${IOS_DEPLOYMENT_TARGET}" \
+            build
+
+      - name: Verify CrossDesk Mobile
+        shell: bash
+        run: |
+          APP_PATH="${DERIVED_DATA}/Build/Products/Release-iphoneos/CrossDeskMobile.app"
+          EXECUTABLE_PATH="${APP_PATH}/CrossDeskMobile"
+          INFO_PLIST="${APP_PATH}/Info.plist"
+
+          if [[ ! -x "${EXECUTABLE_PATH}" ]]; then
+            echo "CrossDeskMobile executable is missing from ${APP_PATH}" >&2
+            exit 1
+          fi
+
+          xcrun lipo "${EXECUTABLE_PATH}" -verify_arch arm64
+          APP_VERSION=$(/usr/libexec/PlistBuddy -c 'Print :CFBundleShortVersionString' "${INFO_PLIST}")
+          if [[ "${APP_VERSION}" != "${IOS_VERSION_BASE}" ]]; then
+            echo "Unexpected iOS app version: expected ${IOS_VERSION_BASE}, got ${APP_VERSION}" >&2
+            exit 1
+          fi
+          MINIMUM_OS=$(/usr/libexec/PlistBuddy -c 'Print :MinimumOSVersion' "${INFO_PLIST}")
+          if [[ "${MINIMUM_OS}" != "${IOS_DEPLOYMENT_TARGET}" ]]; then
+            echo "Unexpected minimum iOS version: expected ${IOS_DEPLOYMENT_TARGET}, got ${MINIMUM_OS}" >&2
+            exit 1
+          fi
+
+          VERIFY_FLAGS=()
+          if [[ "${CROSSDESK_RELEASE_BUILD:-NO}" == "YES" ]]; then
+            VERIFY_FLAGS+=(--require-release)
+          fi
+          python3 apps/ios/scripts/verify_app_bundle.py "${APP_PATH}" "${VERIFY_FLAGS[@]}"
+          xcrun lipo -info "${EXECUTABLE_PATH}"
+          echo "Minimum iOS version: ${MINIMUM_OS}"
+
+      - name: Package CrossDesk Mobile
+        shell: bash
+        run: |
+          APP_PATH="${DERIVED_DATA}/Build/Products/Release-iphoneos/CrossDeskMobile.app"
+          PACKAGE_DIR="${RUNNER_TEMP}/crossdesk-ios-arm64-unsigned-${VERSION_NUM}"
+          PACKAGE_FILE="${GITHUB_WORKSPACE}/crossdesk-ios-arm64-unsigned-${VERSION_NUM}.zip"
+
+          mkdir -p "${PACKAGE_DIR}"
+          cp -R "${APP_PATH}" "${PACKAGE_DIR}/"
+          cp apps/ios/licenses/sources.json "${PACKAGE_DIR}/ThirdPartySources.json"
+          cp apps/ios/licenses/OPEN_SOURCE_NOTICE.txt "${PACKAGE_DIR}/OPEN_SOURCE_NOTICE.txt"
+          cp "${APP_PATH}/SourceMetadata.json" "${PACKAGE_DIR}/SourceMetadata.json"
+
+          DSYM_PATH="${DERIVED_DATA}/Build/Products/Release-iphoneos/CrossDeskMobile.app.dSYM"
+          if [[ -d "${DSYM_PATH}" ]]; then
+            cp -R "${DSYM_PATH}" "${PACKAGE_DIR}/"
+          fi
+
+          ditto -c -k --sequesterRsrc --keepParent "${PACKAGE_DIR}" "${PACKAGE_FILE}"
+          echo "PACKAGE_FILE=${PACKAGE_FILE}" >> "${GITHUB_ENV}"
+
+      - name: Upload build artifact
+        uses: actions/upload-artifact@v6
+        with:
+          name: crossdesk-ios-arm64-unsigned-${{ env.VERSION_NUM }}
+          path: ${{ env.PACKAGE_FILE }}
+          if-no-files-found: error

.github/workflows/build-linux-image.yml

@@ -0,0 +1,157 @@
+name: Build Linux Build Image
+
+on:
+  push:
+    branches:
+      - ci/linux-build-image
+    paths:
+      - .dockerignore
+      - .gitmodules
+      - .github/workflows/build-linux-image.yml
+      - docker/linux-build/**
+      - xmake.lua
+      - xmake/**
+      - deps/thirdparty/**
+      - deps/submodules/xmake.lua
+      - deps/submodules/minirtc
+      - deps/submodules/minirtc/xmake.lua
+      - deps/submodules/minirtc/thirdparty/**
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: linux-build-image-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  IMAGE_NAME: crossdesk/ubuntu20.04
+  STACK_TAG: buildenv-cuda12.6.3-gcc10-cmake3.31.6-pipewire0.3.48-xmake3.0.9-rust1.92.0
+  CMAKE_VERSION: 3.31.6
+  XMAKE_VERSION: 3.0.9
+  RUST_VERSION: 1.92.0
+  RUSTUP_VERSION: 1.28.2
+
+jobs:
+  build:
+    name: Build candidate (${{ matrix.arch }})
+    runs-on: ${{ matrix.runner }}
+    timeout-minutes: 180
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - arch: amd64
+            platform: linux/amd64
+            runner: ubuntu-24.04
+            base_image: nvidia/cuda:12.6.3-devel-ubuntu20.04
+          - arch: arm64
+            platform: linux/arm64
+            runner: ubuntu-24.04-arm
+            base_image: ubuntu:20.04
+    steps:
+      - name: Set candidate tag
+        id: image
+        run: |
+          CANDIDATE_TAG="${IMAGE_NAME}:${STACK_TAG}-${GITHUB_SHA}-${{ matrix.arch }}"
+          echo "CANDIDATE_TAG=${CANDIDATE_TAG}" >> "${GITHUB_ENV}"
+          echo "candidate=${CANDIDATE_TAG}" >> "${GITHUB_OUTPUT}"
+
+      - name: Checkout source
+        uses: actions/checkout@v5
+        with:
+          submodules: recursive
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v4
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v4
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push candidate
+        uses: docker/build-push-action@v7
+        with:
+          context: .
+          file: docker/linux-build/Dockerfile
+          platforms: ${{ matrix.platform }}
+          push: true
+          pull: true
+          tags: ${{ steps.image.outputs.candidate }}
+          cache-from: type=registry,ref=${{ env.IMAGE_NAME }}:${{ env.STACK_TAG }}
+          cache-to: type=inline
+          provenance: false
+          sbom: false
+          build-args: |
+            BASE_IMAGE=${{ matrix.base_image }}
+            CMAKE_VERSION=${{ env.CMAKE_VERSION }}
+            XMAKE_VERSION=${{ env.XMAKE_VERSION }}
+            RUST_VERSION=${{ env.RUST_VERSION }}
+            RUSTUP_VERSION=${{ env.RUSTUP_VERSION }}
+
+  verify:
+    name: Verify candidate (${{ matrix.arch }})
+    needs: build
+    runs-on: ${{ matrix.runner }}
+    timeout-minutes: 30
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - arch: amd64
+            runner: ubuntu-24.04
+          - arch: arm64
+            runner: ubuntu-24.04-arm
+    steps:
+      - name: Set candidate tag
+        run: |
+          CANDIDATE_TAG="${IMAGE_NAME}:${STACK_TAG}-${GITHUB_SHA}-${{ matrix.arch }}"
+          echo "CANDIDATE_TAG=${CANDIDATE_TAG}" >> "${GITHUB_ENV}"
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v4
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Verify tools, architecture, and Ubuntu baseline
+        run: |
+          docker pull "${CANDIDATE_TAG}"
+          docker run --rm \
+            --env EXPECTED_ARCH="${{ matrix.arch }}" \
+            "${CANDIDATE_TAG}" \
+            verify-crossdesk-build-image
+
+  publish:
+    name: Publish multi-arch image
+    needs: verify
+    runs-on: ubuntu-24.04
+    timeout-minutes: 20
+    steps:
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v4
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v4
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Promote verified candidates
+        run: |
+          AMD64_IMAGE="${IMAGE_NAME}:${STACK_TAG}-${GITHUB_SHA}-amd64"
+          ARM64_IMAGE="${IMAGE_NAME}:${STACK_TAG}-${GITHUB_SHA}-arm64"
+
+          docker buildx imagetools create \
+            --tag "${IMAGE_NAME}:${STACK_TAG}" \
+            --tag "${IMAGE_NAME}:sha-${GITHUB_SHA}" \
+            --tag "${IMAGE_NAME}:latest" \
+            "${AMD64_IMAGE}" \
+            "${ARM64_IMAGE}"
+
+      - name: Inspect published manifest
+        run: |
+          docker buildx imagetools inspect "${IMAGE_NAME}:${STACK_TAG}"

.github/workflows/build.yml

@@ -0,0 +1,734 @@
+name: Build and Release
+
+on:
+  push:
+    branches:
+      - "**"
+      - "!ci/linux-build-image"
+    tags:
+      - "*"
+      - "!ios-v*"
+      - "!android-v*"
+  workflow_dispatch:
+    inputs:
+      patch:
+        description: "Hotfix patch number, for example 1 or 2. Use 0 for a normal build."
+        required: false
+        default: "0"
+      sign_windows_test:
+        description: "Submit the Windows installer to SignPath using test-signing."
+        required: false
+        type: boolean
+        default: false
+
+permissions:
+  actions: read
+  contents: write
+
+env:
+  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+jobs:
+  build-linux:
+    name: Build Linux (${{ matrix.arch }})
+    runs-on: ${{ matrix.runner }}
+    strategy:
+      matrix:
+        include:
+          - arch: amd64
+            runner: ubuntu-24.04
+            image: crossdesk/ubuntu20.04:buildenv-cuda12.6.3-gcc10-cmake3.31.6-pipewire0.3.48-xmake3.0.9-rust1.92.0
+            package_script: ./apps/desktop/scripts/linux/pkg_amd64.sh
+
+          - arch: arm64
+            runner: ubuntu-24.04-arm
+            image: crossdesk/ubuntu20.04:buildenv-cuda12.6.3-gcc10-cmake3.31.6-pipewire0.3.48-xmake3.0.9-rust1.92.0
+            package_script: ./apps/desktop/scripts/linux/pkg_arm64.sh
+
+    container:
+      image: ${{ matrix.image }}
+      options: --user root
+
+    steps:
+      - name: Extract version number
+        shell: bash
+        run: |
+          VERSION_REF="${GITHUB_REF##*/}"
+          VERSION_BASE="${VERSION_REF#v}"
+          PATCH_NUMBER="${{ github.event.inputs.patch }}"
+          BUILD_DATE_OVERRIDE=""
+
+          if [[ ! "${PATCH_NUMBER}" =~ ^[0-9]+$ ]]; then
+            PATCH_NUMBER=0
+          fi
+
+          if [[ "${VERSION_BASE}" =~ ^([0-9]+(\.[0-9]+){1,3})-([0-9]+)-([0-9]{8})$ ]]; then
+            VERSION_BASE="${BASH_REMATCH[1]}"
+            PATCH_NUMBER="${BASH_REMATCH[3]}"
+            BUILD_DATE_OVERRIDE="${BASH_REMATCH[4]}"
+          elif [[ "${VERSION_BASE}" =~ ^([0-9]+(\.[0-9]+){1,3})-([0-9]{8})-([0-9]+)$ ]]; then
+            VERSION_BASE="${BASH_REMATCH[1]}"
+            BUILD_DATE_OVERRIDE="${BASH_REMATCH[3]}"
+            PATCH_NUMBER="${BASH_REMATCH[4]}"
+          elif [[ "${VERSION_BASE}" =~ ^([0-9]+(\.[0-9]+){1,3})-([0-9]{8})$ ]]; then
+            VERSION_BASE="${BASH_REMATCH[1]}"
+            BUILD_DATE_OVERRIDE="${BASH_REMATCH[3]}"
+          elif [[ "${VERSION_BASE}" =~ ^([0-9]+(\.[0-9]+){1,3})-([0-9]+)$ && "${PATCH_NUMBER}" == "0" ]]; then
+            VERSION_BASE="${BASH_REMATCH[1]}"
+            PATCH_NUMBER="${BASH_REMATCH[3]}"
+          fi
+
+          echo "VERSION_BASE=${VERSION_BASE}" >> $GITHUB_ENV
+          echo "PATCH_NUMBER=${PATCH_NUMBER}" >> $GITHUB_ENV
+          echo "BUILD_DATE_OVERRIDE=${BUILD_DATE_OVERRIDE}" >> $GITHUB_ENV
+
+      - name: Set legal Debian version
+        shell: bash
+        run: |
+          BUILD_DATE="${BUILD_DATE_OVERRIDE}"
+          if [[ -z "${BUILD_DATE}" ]]; then
+            BUILD_DATE=$(TZ=Asia/Shanghai date +%Y%m%d)
+          fi
+
+          if [[ ! "${VERSION_BASE}" =~ ^[0-9] ]]; then
+            VERSION_BASE="0.0.0-${VERSION_BASE}"
+          fi
+
+          if [[ "${PATCH_NUMBER}" != "0" ]]; then
+            LEGAL_VERSION="v${VERSION_BASE}-${PATCH_NUMBER}-${BUILD_DATE}"
+          else
+            LEGAL_VERSION="v${VERSION_BASE}-${BUILD_DATE}"
+          fi
+
+          echo "LEGAL_VERSION=${LEGAL_VERSION}" >> $GITHUB_ENV
+          echo "BUILD_DATE=${BUILD_DATE}" >> $GITHUB_ENV
+
+      - name: Checkout code
+        uses: actions/checkout@v5
+        with:
+          submodules: recursive
+
+      - name: Verify Linux build image
+        run: verify-crossdesk-build-image
+
+      - name: Ensure Wayland build dependencies
+        shell: bash
+        run: |
+          if pkg-config --exists dbus-1 libdrm && \
+             test -f /opt/crossdesk-pipewire-sdk/include/pipewire-0.3/pipewire/pipewire.h && \
+             test -f /opt/crossdesk-pipewire-sdk/include/spa-0.2/spa/param/video/format-utils.h; then
+            exit 0
+          fi
+
+          apt-get update
+          apt-get install -y --no-install-recommends \
+            libdbus-1-dev \
+            libdrm-dev
+          rm -rf /var/lib/apt/lists/*
+
+          install-crossdesk-pipewire-sdk
+          pkg-config --exists dbus-1 libdrm
+          test -f /opt/crossdesk-pipewire-sdk/include/pipewire-0.3/pipewire/pipewire.h
+          test -f /opt/crossdesk-pipewire-sdk/include/spa-0.2/spa/param/video/format-utils.h
+
+      - name: Build CrossDesk
+        env:
+          CUDA_PATH: /usr/local/cuda
+          XMAKE_GLOBALDIR: /data
+        run: |
+          xmake f --CROSSDESK_VERSION=${LEGAL_VERSION} --USE_CUDA=true --USE_WAYLAND=true \
+            --cc=gcc-10 --cxx=g++-10 --root -y
+          xmake b -vy --root crossdesk
+
+      - name: Verify repository and wire boundaries
+        env:
+          XMAKE_GLOBALDIR: /data
+        run: |
+          xmake b -vy --root repository_structure_test
+          xmake b -vy --root crossdesk_wire_test
+          xmake b -vy --root keyboard_state_wire_test
+          xmake run --root repository_structure_test
+          xmake run --root crossdesk_wire_test
+          xmake run --root keyboard_state_wire_test
+
+      - name: Install Linux headless runtime dependencies
+        run: |
+          apt-get update
+          apt-get install -y --no-install-recommends xvfb xfce4 dbus
+
+      - name: Package
+        run: |
+          chmod +x ${{ matrix.package_script }}
+          ${{ matrix.package_script }} ${LEGAL_VERSION}
+
+      - name: Verify Ubuntu 20.04 package dependency resolution
+        run: |
+          PACKAGE_FILE="${GITHUB_WORKSPACE}/crossdesk-linux-${{ matrix.arch }}-${LEGAL_VERSION}.deb"
+          apt-get update
+          apt-get install --simulate "${PACKAGE_FILE}"
+
+      - name: Verify packaged Ubuntu 20.04 glibc baseline
+        run: |
+          PACKAGE_FILE="${GITHUB_WORKSPACE}/crossdesk-linux-${{ matrix.arch }}-${LEGAL_VERSION}.deb"
+          VERIFY_DIR="${RUNNER_TEMP}/crossdesk-glibc-${{ matrix.arch }}"
+          install -d "${VERIFY_DIR}"
+          dpkg-deb --extract "${PACKAGE_FILE}" "${VERIFY_DIR}"
+          verify-crossdesk-glibc-baseline "${VERIFY_DIR}" 2.31
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v6
+        with:
+          name: crossdesk-linux-${{ matrix.arch }}-${{ env.LEGAL_VERSION }}
+          path: ${{ github.workspace }}/crossdesk-linux-${{ matrix.arch }}-${{ env.LEGAL_VERSION }}.deb
+
+  # macOS
+  build-macos:
+    name: Build on macOS
+    runs-on: ${{ matrix.runner }}
+    env:
+      MACOSX_DEPLOYMENT_TARGET: "14.0"
+      EXPECTED_MACOS_SDK: "26.5"
+    strategy:
+      matrix:
+        include:
+          - arch: x64
+            binary_arch: x86_64
+            runner: macos-26-intel
+            cache-key: intel-macos26-xcode26.6-min14
+            out-dir: ./build/macosx/x86_64/release/crossdesk
+            package_script: ./apps/desktop/scripts/macos/pkg_x64.sh
+          - arch: arm64
+            binary_arch: arm64
+            runner: macos-26
+            cache-key: arm-macos26-xcode26.6-min14
+            out-dir: ./build/macosx/arm64/release/crossdesk
+            package_script: ./apps/desktop/scripts/macos/pkg_arm64.sh
+
+    steps:
+      - name: Extract version number
+        id: version
+        shell: bash
+        run: |
+          VERSION_REF="${GITHUB_REF##*/}"
+          VERSION_BASE="${VERSION_REF#v}"
+          BUILD_DATE=$(TZ=Asia/Shanghai date +%Y%m%d)
+          PATCH_NUMBER="${{ github.event.inputs.patch }}"
+
+          if [[ ! "${PATCH_NUMBER}" =~ ^[0-9]+$ ]]; then
+            PATCH_NUMBER=0
+          fi
+
+          if [[ "${VERSION_BASE}" =~ ^([0-9]+(\.[0-9]+){1,3})-([0-9]+)-([0-9]{8})$ ]]; then
+            VERSION_BASE="${BASH_REMATCH[1]}"
+            PATCH_NUMBER="${BASH_REMATCH[3]}"
+            BUILD_DATE="${BASH_REMATCH[4]}"
+          elif [[ "${VERSION_BASE}" =~ ^([0-9]+(\.[0-9]+){1,3})-([0-9]{8})-([0-9]+)$ ]]; then
+            VERSION_BASE="${BASH_REMATCH[1]}"
+            BUILD_DATE="${BASH_REMATCH[3]}"
+            PATCH_NUMBER="${BASH_REMATCH[4]}"
+          elif [[ "${VERSION_BASE}" =~ ^([0-9]+(\.[0-9]+){1,3})-([0-9]{8})$ ]]; then
+            VERSION_BASE="${BASH_REMATCH[1]}"
+            BUILD_DATE="${BASH_REMATCH[3]}"
+          elif [[ "${VERSION_BASE}" =~ ^([0-9]+(\.[0-9]+){1,3})-([0-9]+)$ && "${PATCH_NUMBER}" == "0" ]]; then
+            VERSION_BASE="${BASH_REMATCH[1]}"
+            PATCH_NUMBER="${BASH_REMATCH[3]}"
+          fi
+
+          if [[ "${PATCH_NUMBER}" != "0" ]]; then
+            VERSION_NUM="v${VERSION_BASE}-${PATCH_NUMBER}-${BUILD_DATE}"
+          else
+            VERSION_NUM="v${VERSION_BASE}-${BUILD_DATE}"
+          fi
+
+          echo "VERSION_NUM=${VERSION_NUM}" >> $GITHUB_ENV
+          echo "VERSION_NUM=${VERSION_NUM}"
+          echo "BUILD_DATE=${BUILD_DATE}" >> $GITHUB_ENV
+          echo "PATCH_NUMBER=${PATCH_NUMBER}" >> $GITHUB_ENV
+
+      - name: Select Xcode 26.6
+        shell: bash
+        run: |
+          sudo xcode-select -s /Applications/Xcode_26.6.app/Contents/Developer
+          xcodebuild -version
+          SDK_VERSION="$(xcrun --sdk macosx --show-sdk-version)"
+          if [[ "${SDK_VERSION}" != "${EXPECTED_MACOS_SDK}" ]]; then
+            echo "Unexpected macOS SDK: expected ${EXPECTED_MACOS_SDK}, got ${SDK_VERSION}" >&2
+            exit 1
+          fi
+
+      - name: Cache xmake dependencies
+        uses: actions/cache@v5
+        with:
+          path: ~/.xmake/packages
+          key: "${{ runner.os }}-xmake-deps-${{ matrix.cache-key }}-${{ github.run_id }}"
+          restore-keys: |
+            ${{ runner.os }}-xmake-deps-${{ matrix.cache-key }}-
+
+      - name: Install xmake
+        run: brew install xmake
+
+      - name: Update xmake repositories
+        run: xmake repo -u
+
+      - name: Checkout code
+        uses: actions/checkout@v5
+
+      - name: Initialize submodules
+        run: git submodule update --init --recursive
+
+      - name: Build CrossDesk
+        run: |
+          xmake f --target_minver=${MACOSX_DEPLOYMENT_TARGET} --CROSSDESK_VERSION=${VERSION_NUM} --USE_CUDA=false -vyD
+          xmake b -vy crossdesk
+
+      - name: Package CrossDesk app
+        run: |
+          chmod +x ${{ matrix.package_script }}
+          ${{ matrix.package_script }} ${VERSION_NUM}
+
+      - name: Verify packaged app
+        shell: bash
+        run: |
+          PACKAGE_FILE="${GITHUB_WORKSPACE}/crossdesk-macos-${{ matrix.arch }}-${VERSION_NUM}.pkg"
+          VERIFY_DIR="$(mktemp -d "${RUNNER_TEMP}/crossdesk-macos-pkg.XXXXXX")"
+          trap 'rm -rf "${VERIFY_DIR}"' EXIT
+
+          pkgutil --expand-full "${PACKAGE_FILE}" "${VERIFY_DIR}/expanded"
+          APP_PATH="$(find "${VERIFY_DIR}/expanded" -type d -name 'CrossDesk.app' -print -quit)"
+          if [[ -z "${APP_PATH}" ]]; then
+            echo "CrossDesk.app is missing from ${PACKAGE_FILE}" >&2
+            exit 1
+          fi
+
+          ./apps/desktop/scripts/macos/verify_app.sh "${APP_PATH}" "${{ matrix.binary_arch }}" "${EXPECTED_MACOS_SDK}"
+
+      - name: Upload build artifacts
+        uses: actions/upload-artifact@v6
+        with:
+          name: crossdesk-macos-${{ matrix.arch }}-${{ env.VERSION_NUM }}
+          path: crossdesk-macos-${{ matrix.arch }}-${{ env.VERSION_NUM }}.pkg
+
+      - name: Move files to release dir
+        run: |
+          mkdir -p release
+          cp crossdesk-macos-${{ matrix.arch }}-${{ env.VERSION_NUM }}.pkg release/
+
+  # iOS (also available as a standalone workflow)
+  build-ios:
+    name: Build iOS
+    uses: ./.github/workflows/build-ios.yml
+    with:
+      patch: ${{ inputs.patch || '0' }}
+    permissions:
+      contents: read
+
+  # Android (also available as a standalone workflow)
+  build-android:
+    name: Build Android
+    uses: ./.github/workflows/build-android.yml
+    permissions:
+      contents: read
+
+  # Windows
+  build-windows-x64:
+    name: Build on Windows x64
+    runs-on: windows-2022
+    env:
+      XMAKE_GLOBALDIR: D:\xmake_global
+    steps:
+      - name: Extract version number
+        shell: pwsh
+        run: |
+          $ref = $env:GITHUB_REF
+          $version = $ref -replace '^refs/(tags|heads)/', ''
+          $version = $version -replace '^v', ''
+          $version = $version -replace '/', '-'
+          $BUILD_DATE = ([System.TimeZoneInfo]::ConvertTimeBySystemTimeZoneId((Get-Date), "China Standard Time")).ToString("yyyyMMdd")
+          $PATCH_NUMBER = "${{ github.event.inputs.patch }}"
+
+          if ($PATCH_NUMBER -notmatch '^[0-9]+$') {
+            $PATCH_NUMBER = "0"
+          }
+
+          if ($version -match '^([0-9]+(\.[0-9]+){1,3})-([0-9]+)-([0-9]{8})$') {
+            $version = $Matches[1]
+            $PATCH_NUMBER = $Matches[3]
+            $BUILD_DATE = $Matches[4]
+          } elseif ($version -match '^([0-9]+(\.[0-9]+){1,3})-([0-9]{8})-([0-9]+)$') {
+            $version = $Matches[1]
+            $BUILD_DATE = $Matches[3]
+            $PATCH_NUMBER = $Matches[4]
+          } elseif ($version -match '^([0-9]+(\.[0-9]+){1,3})-([0-9]{8})$') {
+            $version = $Matches[1]
+            $BUILD_DATE = $Matches[3]
+          } elseif ($version -match '^([0-9]+(\.[0-9]+){1,3})-([0-9]+)$' -and $PATCH_NUMBER -eq "0") {
+            $version = $Matches[1]
+            $PATCH_NUMBER = $Matches[3]
+          }
+
+          if ($PATCH_NUMBER -ne "0") {
+            $VERSION_NUM = "v$version-$PATCH_NUMBER-$BUILD_DATE"
+          } else {
+            $VERSION_NUM = "v$version-$BUILD_DATE"
+          }
+
+          echo "VERSION_NUM=$VERSION_NUM" >> $env:GITHUB_ENV
+          echo "BUILD_DATE=$BUILD_DATE" >> $env:GITHUB_ENV
+          echo "PATCH_NUMBER=$PATCH_NUMBER" >> $env:GITHUB_ENV
+
+      - name: Cache xmake dependencies
+        uses: actions/cache@v5
+        with:
+          path: D:\xmake_global\.xmake\packages
+          key: "${{ runner.os }}-xmake-deps-intel-${{ github.run_id }}"
+          restore-keys: |
+            ${{ runner.os }}-xmake-deps-intel-
+
+      - name: Install xmake
+        run: |
+          Invoke-Expression (Invoke-Webrequest 'https://raw.githubusercontent.com/tboox/xmake/master/scripts/get.ps1' -UseBasicParsing).Content
+          echo "C:\Users\runneradmin\xmake" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+          xmake repo -u
+          xmake create cuda
+          Set-Location cuda
+          xmake g --theme=plain
+          $cudaPath = ""
+          $packagesPath = "D:\xmake_global\.xmake\packages"
+
+          if (Test-Path $packagesPath) {
+              Write-Host "Packages directory exists: $packagesPath"
+              try {
+                  $info = xmake require --info "cuda 12.6.3" 2>$null
+                  if ($null -ne $info -and $info -ne "") {
+                      $cudaPath = (($info | Select-String installdir).ToString() -replace '.*installdir:\s*','').Trim()
+                  }
+              } catch {}
+          } else {
+              Write-Host "Packages directory not found: $packagesPath"
+              Write-Host "Installing CUDA package..."
+              xmake require -vy "cuda 12.6.3"
+              $info = xmake require --info "cuda 12.6.3"
+              $cudaPath = (($info | Select-String installdir).ToString() -replace '.*installdir:\s*','').Trim()
+          }
+
+          echo "CUDA_PATH=$cudaPath" >> $env:GITHUB_ENV
+          Write-Host "Resolved CUDA_PATH = $cudaPath"
+          Pop-Location
+
+      - name: Download INetC plugin
+        shell: powershell
+        run: |
+          $url = "https://github.com/DigitalMediaServer/NSIS-INetC-plugin/releases/download/v1.0.5.7/InetC.zip"
+          $out = "$env:RUNNER_TEMP\InetC.zip"
+          Invoke-WebRequest -Uri $url -OutFile $out
+          Expand-Archive $out -DestinationPath "$env:RUNNER_TEMP\InetC" -Force
+
+          $source = "$env:RUNNER_TEMP\InetC\x86-unicode\INetC.dll"
+          $target = "C:\Program Files (x86)\NSIS\Plugins\x86-unicode\INetC.dll"
+
+          Write-Host "Copying $source to $target"
+          Copy-Item $source $target -Force
+
+      - name: Checkout code
+        uses: actions/checkout@v5
+
+      - name: Initialize submodules
+        run: git submodule update --init --recursive
+
+      - name: Copy nsProcess plugin to NSIS folder
+        run: |
+          $nsisPluginDir = "C:\Program Files (x86)\NSIS\Plugins\x86-unicode"
+          copy "${{ github.workspace }}\apps\desktop\scripts\windows\nsProcess.dll" $nsisPluginDir
+
+      - name: Build CrossDesk
+        run: |
+          xmake f --CROSSDESK_VERSION=${{ env.VERSION_NUM }} --USE_CUDA=true -y
+          xmake b -vy crossdesk
+
+      - name: Package
+        shell: pwsh
+        run: |
+          & "${{ github.workspace }}\apps\desktop\scripts\windows\pkg_x64.ps1" $env:VERSION_NUM
+
+      - name: Upload unsigned Windows installer for test signing
+        if: github.event_name == 'workflow_dispatch' && inputs.sign_windows_test
+        id: upload-unsigned-windows-installer
+        uses: actions/upload-artifact@v7
+        with:
+          path: ${{ github.workspace }}/apps/desktop/scripts/windows/crossdesk-win-x64-${{ env.VERSION_NUM }}.exe
+          archive: false
+          if-no-files-found: error
+          retention-days: 1
+
+      - name: Sign Windows installer with SignPath test certificate
+        if: github.event_name == 'workflow_dispatch' && inputs.sign_windows_test
+        uses: signpath/github-action-submit-signing-request@v2
+        with:
+          api-token: ${{ secrets.SIGNPATH_API_TOKEN }}
+          organization-id: ${{ vars.SIGNPATH_ORGANIZATION_ID }}
+          project-slug: crossdesk
+          signing-policy-slug: test-signing
+          github-artifact-id: ${{ steps.upload-unsigned-windows-installer.outputs.artifact-id }}
+          wait-for-completion: true
+          output-artifact-directory: ${{ github.workspace }}\signpath\signed-installer
+          skip-decompress: true
+          parameters: |
+            version: ${{ toJSON(env.VERSION_NUM) }}
+
+      - name: Verify and use test-signed Windows installer
+        if: github.event_name == 'workflow_dispatch' && inputs.sign_windows_test
+        shell: pwsh
+        run: |
+          $installerName = "crossdesk-win-x64-${{ env.VERSION_NUM }}.exe"
+          $signedInstaller = Join-Path "${{ github.workspace }}\signpath\signed-installer" $installerName
+          $destination = Join-Path "${{ github.workspace }}\apps\desktop\scripts\windows" $installerName
+
+          if (!(Test-Path $signedInstaller)) {
+            throw "SignPath did not return the signed installer: $signedInstaller"
+          }
+
+          $signature = Get-AuthenticodeSignature $signedInstaller
+          if (!$signature.SignerCertificate -or $signature.Status -eq "NotSigned") {
+            throw "SignPath returned an installer without an Authenticode signature."
+          }
+
+          Write-Host "Signer: $($signature.SignerCertificate.Subject)"
+          Write-Host "Signature status: $($signature.Status)"
+          Copy-Item $signedInstaller $destination -Force
+
+      - name: Build Portable CrossDesk
+        run: |
+          xmake f --CROSSDESK_VERSION=${{ env.VERSION_NUM }} --USE_CUDA=true --CROSSDESK_PORTABLE=true -y
+          xmake b -vy crossdesk
+
+      - name: Package Portable
+        shell: pwsh
+        run: |
+          $buildDir = "${{ github.workspace }}\build\windows\x64\release"
+          $portableDir = "${{ github.workspace }}\portable"
+          New-Item -ItemType Directory -Force -Path $portableDir
+
+          $portableFiles = @(
+            @("crossdesk.exe", "CrossDesk.exe"),
+            @("crossdesk_service.exe", "crossdesk_service.exe"),
+            @("crossdesk_session_helper.exe", "crossdesk_session_helper.exe"),
+            @("crossdesk_privacy_cursor_helper.exe", "crossdesk_privacy_cursor_helper.exe"),
+            @("crossdesk_privacy_window.dll", "crossdesk_privacy_window.dll"),
+            @("slint_cpp.dll", "slint_cpp.dll")
+          )
+
+          foreach ($file in $portableFiles) {
+            $source = Join-Path $buildDir $file[0]
+            $destination = Join-Path $portableDir $file[1]
+            if (!(Test-Path $source)) {
+              throw "Missing portable package file: $source"
+            }
+            Copy-Item $source $destination -Force
+          }
+
+          Copy-Item (Join-Path $buildDir "*.dll") $portableDir -Force
+
+          # Bundled Amyuni usbmmidd_v2 virtual display driver (headless hosts)
+          $driverDir = Join-Path $buildDir "usbmmidd_v2"
+          if (!(Test-Path (Join-Path $driverDir "deviceinstaller64.exe"))) {
+            throw "Missing bundled usbmmidd_v2 driver package: $driverDir"
+          }
+          Copy-Item $driverDir (Join-Path $portableDir "usbmmidd_v2") -Recurse -Force
+
+          foreach ($file in $portableFiles) {
+            $packagedFile = Join-Path $portableDir $file[1]
+            if (!(Test-Path $packagedFile)) {
+              throw "Portable package is missing: $packagedFile"
+            }
+          }
+
+          Compress-Archive -Path "$portableDir\*" -DestinationPath "${{ github.workspace }}\crossdesk-win-x64-portable-${{ env.VERSION_NUM }}.zip"
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v6
+        with:
+          name: crossdesk-win-x64-${{ env.VERSION_NUM }}
+          path: ${{ github.workspace }}/apps/desktop/scripts/windows/crossdesk-win-x64-${{ env.VERSION_NUM }}.exe
+
+      - name: Upload portable artifact
+        uses: actions/upload-artifact@v6
+        with:
+          name: crossdesk-win-x64-portable-${{ env.VERSION_NUM }}
+          path: ${{ github.workspace }}/crossdesk-win-x64-portable-${{ env.VERSION_NUM }}.zip
+
+  sign-android:
+    name: Sign Android release
+    needs: build-android
+    if: startsWith(github.ref, 'refs/tags/v')
+    uses: ./.github/workflows/sign-android.yml
+    with:
+      version: ${{ needs.build-android.outputs.version }}
+    secrets:
+      ANDROID_KEYSTORE_BASE64: ${{ secrets.ANDROID_KEYSTORE_BASE64 }}
+      ANDROID_KEYSTORE_PASSWORD: ${{ secrets.ANDROID_KEYSTORE_PASSWORD }}
+      ANDROID_KEY_ALIAS: ${{ secrets.ANDROID_KEY_ALIAS }}
+      ANDROID_KEY_PASSWORD: ${{ secrets.ANDROID_KEY_PASSWORD }}
+
+  release:
+    name: Publish Release
+    if: startsWith(github.ref, 'refs/tags/v')
+    needs: [build-linux, build-macos, build-ios, build-android, sign-android, build-windows-x64]
+    runs-on: ubuntu-latest
+    concurrency:
+      group: publish-release-metadata
+      cancel-in-progress: false
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v5
+
+      - name: Download all artifacts
+        uses: actions/download-artifact@v8
+        with:
+          path: artifacts
+
+      - name: Verify release manifest updates
+        run: python3 -B -m unittest discover -s .github/scripts -p 'test_*.py' -v
+
+      - name: Extract version number
+        id: version
+        shell: bash
+        run: |
+          VERSION_REF="${GITHUB_REF##*/}"
+          VERSION_BASE="${VERSION_REF#v}"
+          BUILD_DATE=$(TZ=Asia/Shanghai date +%Y%m%d)
+          PATCH_NUMBER="${{ github.event.inputs.patch }}"
+
+          if [[ ! "${PATCH_NUMBER}" =~ ^[0-9]+$ ]]; then
+            PATCH_NUMBER=0
+          fi
+
+          if [[ "${VERSION_BASE}" =~ ^([0-9]+(\.[0-9]+){1,3})-([0-9]+)-([0-9]{8})$ ]]; then
+            VERSION_BASE="${BASH_REMATCH[1]}"
+            PATCH_NUMBER="${BASH_REMATCH[3]}"
+            BUILD_DATE="${BASH_REMATCH[4]}"
+          elif [[ "${VERSION_BASE}" =~ ^([0-9]+(\.[0-9]+){1,3})-([0-9]{8})-([0-9]+)$ ]]; then
+            VERSION_BASE="${BASH_REMATCH[1]}"
+            BUILD_DATE="${BASH_REMATCH[3]}"
+            PATCH_NUMBER="${BASH_REMATCH[4]}"
+          elif [[ "${VERSION_BASE}" =~ ^([0-9]+(\.[0-9]+){1,3})-([0-9]{8})$ ]]; then
+            VERSION_BASE="${BASH_REMATCH[1]}"
+            BUILD_DATE="${BASH_REMATCH[3]}"
+          elif [[ "${VERSION_BASE}" =~ ^([0-9]+(\.[0-9]+){1,3})-([0-9]+)$ && "${PATCH_NUMBER}" == "0" ]]; then
+            VERSION_BASE="${BASH_REMATCH[1]}"
+            PATCH_NUMBER="${BASH_REMATCH[3]}"
+          fi
+
+          BUILD_DATE_ISO="${BUILD_DATE:0:4}-${BUILD_DATE:4:2}-${BUILD_DATE:6:2}"
+          if [[ "${PATCH_NUMBER}" != "0" ]]; then
+            VERSION_NUM="${VERSION_BASE}-${PATCH_NUMBER}-${BUILD_DATE}"
+          else
+            VERSION_NUM="${VERSION_BASE}-${BUILD_DATE}"
+          fi
+
+          VERSION_WITH_V="v${VERSION_NUM}"
+          echo "VERSION_NUM=${VERSION_NUM}" >> $GITHUB_OUTPUT
+          echo "VERSION_WITH_V=${VERSION_WITH_V}" >> $GITHUB_OUTPUT
+          echo "VERSION_BASE=${VERSION_BASE}" >> $GITHUB_OUTPUT
+          echo "BUILD_DATE=${BUILD_DATE}" >> $GITHUB_OUTPUT
+          echo "BUILD_DATE_ISO=${BUILD_DATE_ISO}" >> $GITHUB_OUTPUT
+          echo "PATCH_NUMBER=${PATCH_NUMBER}" >> $GITHUB_OUTPUT
+
+      - name: Prepare release notes
+        run: |
+          cat > "$RUNNER_TEMP/release-notes.md" << EOF
+          ## Corresponding source
+
+          Source for these binaries: [${GITHUB_REF_NAME}](https://github.com/${GITHUB_REPOSITORY}/tree/${GITHUB_SHA}).
+          Clone that version with recursive submodules. The repository includes the build scripts and dependency patches.
+          [iOS source, modification and rebuild instructions](https://github.com/${GITHUB_REPOSITORY}/blob/${GITHUB_SHA}/apps/ios/README.md).
+          The iOS archive also contains the exact source revision and third-party source catalog with archive checksums.
+          [Android source and rebuild instructions](https://github.com/${GITHUB_REPOSITORY}/blob/${GITHUB_SHA}/apps/android/README.md).
+          The Android arm64 Release APK is signed with the CrossDesk publishing key and can be installed directly.
+          It includes the exact application and MiniRTC revisions, license documents and native build recipes.
+
+          ## Code signing policy
+
+          Free code signing provided by [SignPath.io](https://signpath.io/), certificate by [SignPath Foundation](https://signpath.org/).
+          EOF
+
+      - name: Rename artifacts
+        run: |
+          mkdir -p release
+          cp artifacts/crossdesk-macos-x64-${{ steps.version.outputs.VERSION_WITH_V }}/* release/crossdesk-macos-x64-${{ steps.version.outputs.VERSION_WITH_V }}.pkg
+          cp artifacts/crossdesk-macos-arm64-${{ steps.version.outputs.VERSION_WITH_V }}/* release/crossdesk-macos-arm64-${{ steps.version.outputs.VERSION_WITH_V }}.pkg
+          cp artifacts/crossdesk-linux-amd64-${{ steps.version.outputs.VERSION_WITH_V }}/* release/crossdesk-linux-amd64-${{ steps.version.outputs.VERSION_WITH_V }}.deb
+          cp artifacts/crossdesk-linux-arm64-${{ steps.version.outputs.VERSION_WITH_V }}/* release/crossdesk-linux-arm64-${{ steps.version.outputs.VERSION_WITH_V }}.deb
+          cp artifacts/crossdesk-ios-arm64-unsigned-${{ needs.build-ios.outputs.version }}/* release/crossdesk-ios-arm64-unsigned-${{ needs.build-ios.outputs.version }}.zip
+          cp artifacts/crossdesk-android-arm64-${{ needs.build-android.outputs.version }}/*.apk release/crossdesk-android-arm64-${{ needs.build-android.outputs.version }}.apk
+          cp artifacts/crossdesk-win-x64-${{ steps.version.outputs.VERSION_WITH_V }}/* release/crossdesk-win-x64-${{ steps.version.outputs.VERSION_WITH_V }}.exe
+          cp artifacts/crossdesk-win-x64-portable-${{ steps.version.outputs.VERSION_WITH_V }}/* release/crossdesk-win-x64-portable-${{ steps.version.outputs.VERSION_WITH_V }}.zip
+
+      - name: List release files
+        run: ls -lh release/
+
+      - name: Upload to Versioned GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          tag_name: ${{ steps.version.outputs.VERSION_WITH_V }}
+          # The pushed tag already determines the release source commit.
+          target_commitish: ${{ github.event.repository.default_branch }}
+          name: Release ${{ steps.version.outputs.VERSION_WITH_V }}
+          draft: false
+          prerelease: false
+          files: release/*
+          generate_release_notes: false
+          body_path: ${{ runner.temp }}/release-notes.md
+
+      - name: Create or update 'latest' tag
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git tag -f latest
+          git push origin latest --force
+
+      - name: Upload to GitHub Release (latest)
+        uses: softprops/action-gh-release@v2
+        with:
+          tag_name: latest
+          name: Latest Release
+          draft: false
+          prerelease: false
+          files: release/*
+          generate_release_notes: false
+          body_path: ${{ runner.temp }}/release-notes.md
+
+      - name: Upload artifacts to server
+        uses: burnett01/rsync-deployments@5.2
+        with:
+          switches: -avzr --progress
+          path: release/*
+          remote_path: /var/www/html/downloads/
+          remote_host: ${{ secrets.SERVER_HOST }}
+          remote_user: ${{ secrets.SERVER_USER }}
+          remote_key: ${{ secrets.SERVER_KEY }}
+
+      - name: Download current version.json
+        run: |
+          curl --fail --silent --show-error --retry 3 --max-time 30 \
+            -H 'Cache-Control: no-cache' \
+            https://version.crossdesk.cn/version.json -o current-version.json
+
+      - name: Generate version.json for all platforms
+        env:
+          RELEASE_TAG: ${{ steps.version.outputs.VERSION_WITH_V }}
+        run: |
+          python3 .github/scripts/update_version_manifest.py \
+            --current current-version.json --output version.json --artifacts release \
+            --tag "${RELEASE_TAG}" --name "Release ${RELEASE_TAG}" \
+            --notes "${RUNNER_TEMP}/release-notes.md"
+
+      - name: Upload version.json to server
+        uses: burnett01/rsync-deployments@5.2
+        with:
+          switches: -avzr
+          path: version.json
+          remote_path: /var/www/html/version/
+          remote_host: ${{ secrets.SERVER_HOST }}
+          remote_user: ${{ secrets.SERVER_USER }}
+          remote_key: ${{ secrets.SERVER_KEY }}

.github/workflows/close-issue.yml

@@ -0,0 +1,69 @@
+name: Close Inactive Issues
+
+on:
+  schedule:
+    # run every day at midnight
+    - cron: "0 0 * * *"
+  workflow_dispatch:
+
+permissions:
+  issues: write
+  pull-requests: write
+  contents: read
+
+jobs:
+  close_inactive_issues:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check inactive issues and close them
+        uses: actions/github-script@v7
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          script: |
+            const inactivePeriod = 7 * 24 * 60 * 60 * 1000; // 7 days
+            const now = Date.now();
+
+            // paginate through all open issues (listForRepo also returns PRs)
+            const issues = await github.paginate(github.rest.issues.listForRepo, {
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              state: 'open',
+            });
+
+            for (const issue of issues) {
+              // skip pull requests (they are also returned by listForRepo)
+              if (issue.pull_request) continue;
+
+              // skip labeled issues
+              if (issue.labels.length > 0) {
+                console.log(`Skipping issue #${issue.number} (Has labels).`);
+                continue;
+              }
+
+              // last activity time = the issue's own updated_at, which is
+              // refreshed on comments, labels, etc. This avoids relying on
+              // fetching comments and is accurate even when comments are edited.
+              const lastActivityTime = new Date(issue.updated_at).getTime();
+
+              // check inactivity
+              if (now - lastActivityTime > inactivePeriod) {
+                console.log(`Closing inactive issue: #${issue.number} (No activity for 7 days)`);
+
+                await github.rest.issues.createComment({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  issue_number: issue.number,
+                  body: "This issue has been automatically closed due to inactivity for 7 days."
+                });
+
+                await github.rest.issues.update({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  issue_number: issue.number,
+                  state: 'closed',
+                });
+              } else {
+                console.log(`Skipping issue #${issue.number} (Active within 7 days).`);
+              }
+            }

.github/workflows/release-mobile.yml

@@ -0,0 +1,197 @@
+name: Release Mobile
+
+on:
+  push:
+    tags:
+      - "ios-v*"
+      - "android-v*"
+  workflow_dispatch:
+    inputs:
+      source_tag:
+        description: "Existing tag: ios-v0.0.1-20261002 or android-v0.1.0-20261002."
+        required: true
+        type: string
+
+permissions:
+  contents: read
+
+jobs:
+  prepare:
+    name: Validate mobile source tag
+    runs-on: ubuntu-24.04
+    outputs:
+      platform: ${{ steps.source.outputs.platform }}
+      tag: ${{ steps.source.outputs.tag }}
+      version: ${{ steps.source.outputs.version }}
+      sha: ${{ steps.source.outputs.sha }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+          persist-credentials: false
+
+      - name: Resolve source tag
+        id: source
+        shell: python
+        env:
+          SOURCE_TAG: ${{ inputs.source_tag || github.ref_name }}
+        run: |
+          import datetime
+          import os
+          import re
+          import subprocess
+
+          tag = os.environ["SOURCE_TAG"]
+          match = re.fullmatch(r"(ios|android)-(v[0-9]+\.[0-9]+\.[0-9]+-([0-9]{8}))", tag)
+          if not match:
+              raise ValueError("Use an existing ios-v<app-version>-YYYYMMDD or android-v<app-version>-YYYYMMDD tag")
+          datetime.datetime.strptime(match[3], "%Y%m%d")
+          sha = subprocess.check_output(
+              ["git", "rev-parse", "--verify", f"refs/tags/{tag}^{{commit}}"], text=True).strip()
+          with open(os.environ["GITHUB_OUTPUT"], "a") as stream:
+              stream.write(f"platform={match[1]}\ntag={tag}\nversion={match[2]}\nsha={sha}\n")
+
+  build-ios:
+    name: Build iOS release
+    needs: prepare
+    if: needs.prepare.outputs.platform == 'ios'
+    uses: ./.github/workflows/build-ios.yml
+    with:
+      source_tag: ${{ needs.prepare.outputs.tag }}
+
+  build-android:
+    name: Build Android release
+    needs: prepare
+    if: needs.prepare.outputs.platform == 'android'
+    uses: ./.github/workflows/build-android.yml
+    with:
+      source_tag: ${{ needs.prepare.outputs.tag }}
+
+  sign-android:
+    name: Sign Android release
+    needs: [prepare, build-android]
+    if: needs.prepare.outputs.platform == 'android'
+    uses: ./.github/workflows/sign-android.yml
+    with:
+      version: ${{ needs.build-android.outputs.version }}
+    secrets:
+      ANDROID_KEYSTORE_BASE64: ${{ secrets.ANDROID_KEYSTORE_BASE64 }}
+      ANDROID_KEYSTORE_PASSWORD: ${{ secrets.ANDROID_KEYSTORE_PASSWORD }}
+      ANDROID_KEY_ALIAS: ${{ secrets.ANDROID_KEY_ALIAS }}
+      ANDROID_KEY_PASSWORD: ${{ secrets.ANDROID_KEY_PASSWORD }}
+
+  release:
+    name: Publish mobile release
+    needs: [prepare, build-ios, build-android, sign-android]
+    if: ${{ !cancelled() && (needs.build-ios.result == 'success' || needs.sign-android.result == 'success') }}
+    runs-on: ubuntu-24.04
+    permissions:
+      contents: write
+    concurrency:
+      group: publish-release-metadata
+      cancel-in-progress: false
+    env:
+      PLATFORM: ${{ needs.prepare.outputs.platform }}
+      SOURCE_TAG: ${{ needs.prepare.outputs.tag }}
+      SOURCE_SHA: ${{ needs.prepare.outputs.sha }}
+      VERSION: ${{ needs.prepare.outputs.version }}
+      BUILD_VERSION: ${{ needs.build-ios.outputs.version || needs.build-android.outputs.version }}
+    steps:
+      - name: Checkout publishing scripts
+        uses: actions/checkout@v5
+
+      - name: Verify release manifest updates
+        run: python3 -B -m unittest discover -s .github/scripts -p 'test_*.py' -v
+
+      - name: Verify release version
+        shell: bash
+        run: |
+          if [[ "${BUILD_VERSION}" != "${VERSION}" ]]; then
+            echo "Source tag version ${VERSION} does not match the app version ${BUILD_VERSION}" >&2
+            exit 1
+          fi
+
+      - name: Download mobile release artifact
+        uses: actions/download-artifact@v8
+        with:
+          name: crossdesk-${{ env.PLATFORM }}-arm64${{ env.PLATFORM == 'ios' && '-unsigned' || '' }}-${{ env.VERSION }}
+          path: release
+
+      - name: Prepare release notes
+        shell: bash
+        run: |
+          if [[ "${PLATFORM}" == "ios" ]]; then
+            PLATFORM_NAME="iOS"
+            SIGNING_NOTE="The arm64 ZIP contains an unsigned app, source metadata, third-party sources and any generated dSYM. Sign the app before device installation."
+          else
+            PLATFORM_NAME="Android"
+            SIGNING_NOTE="The arm64 Release APK is signed with the CrossDesk publishing key and can be installed directly. It includes source metadata, license documents and native build recipes."
+          fi
+          cat > "${RUNNER_TEMP}/mobile-release-notes.md" << EOF
+          ${PLATFORM_NAME} ${VERSION}
+
+          ${SIGNING_NOTE}
+
+          Source: [${SOURCE_TAG}](https://github.com/${GITHUB_REPOSITORY}/tree/${SOURCE_SHA}).
+          Clone this tag with recursive submodules to obtain the corresponding source.
+          [Source and rebuild instructions](https://github.com/${GITHUB_REPOSITORY}/blob/${SOURCE_SHA}/apps/${PLATFORM}/README.md).
+          EOF
+
+      - name: Publish GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          tag_name: ${{ env.SOURCE_TAG }}
+          # prepare requires an existing tag; this does not move its source commit.
+          # Using the default branch lets GITHUB_TOKEN update older release metadata.
+          target_commitish: ${{ github.event.repository.default_branch }}
+          name: ${{ env.PLATFORM == 'ios' && 'iOS' || 'Android' }} ${{ env.VERSION }}
+          draft: false
+          prerelease: false
+          make_latest: "false"
+          files: release/*
+          fail_on_unmatched_files: true
+          generate_release_notes: false
+          body_path: ${{ runner.temp }}/mobile-release-notes.md
+
+      - name: Upload mobile artifact to download server
+        uses: burnett01/rsync-deployments@5.2
+        with:
+          switches: -avzr --progress
+          path: release/*
+          remote_path: /var/www/html/downloads/
+          remote_host: ${{ secrets.SERVER_HOST }}
+          remote_user: ${{ secrets.SERVER_USER }}
+          remote_key: ${{ secrets.SERVER_KEY }}
+
+      - name: Download current version.json
+        shell: bash
+        run: |
+          curl --fail --silent --show-error --retry 3 --max-time 30 \
+            -H 'Cache-Control: no-cache' \
+            https://version.crossdesk.cn/version.json -o current-version.json
+
+      - name: Update mobile version and download URL
+        shell: bash
+        env:
+          RELEASE_NAME: ${{ env.PLATFORM == 'ios' && 'iOS' || 'Android' }} ${{ env.VERSION }}
+        run: |
+          python3 .github/scripts/update_version_manifest.py \
+            --current current-version.json --output version.json --artifacts release \
+            --tag "${SOURCE_TAG}" --name "${RELEASE_NAME}" \
+            --notes "${RUNNER_TEMP}/mobile-release-notes.md"
+
+      - name: Upload version.json to server
+        uses: burnett01/rsync-deployments@5.2
+        with:
+          switches: -avzr
+          path: version.json
+          remote_path: /var/www/html/version/
+          remote_host: ${{ secrets.SERVER_HOST }}
+          remote_user: ${{ secrets.SERVER_USER }}
+          remote_key: ${{ secrets.SERVER_KEY }}
+
+      - name: Summarize release
+        shell: bash
+        run: |
+          echo "Published [${SOURCE_TAG}](https://github.com/${GITHUB_REPOSITORY}/releases/tag/${SOURCE_TAG}), uploaded its ${PLATFORM} artifact to the download server, and updated version.json." >> "${GITHUB_STEP_SUMMARY}"

.github/workflows/sign-android.yml

@@ -0,0 +1,153 @@
+name: Sign Android Release
+
+on:
+  workflow_call:
+    inputs:
+      version:
+        description: "Android artifact version, for example v1.6.0-20261002."
+        required: true
+        type: string
+    secrets:
+      ANDROID_KEYSTORE_BASE64:
+        required: true
+      ANDROID_KEYSTORE_PASSWORD:
+        required: true
+      ANDROID_KEY_ALIAS:
+        required: true
+      ANDROID_KEY_PASSWORD:
+        required: true
+  workflow_dispatch:
+    inputs:
+      source_tag:
+        description: "Existing Android release to sign without rebuilding, for example android-v1.6.0-20261002."
+        required: true
+        type: string
+
+permissions:
+  contents: read
+
+jobs:
+  sign:
+    name: Sign and verify Android APK
+    runs-on: ubuntu-24.04
+    timeout-minutes: 15
+    env:
+      VERSION: ${{ inputs.version }}
+      SOURCE_TAG: ${{ inputs.source_tag }}
+    steps:
+      - name: Validate signing configuration
+        shell: python
+        env:
+          ANDROID_KEYSTORE_BASE64: ${{ secrets.ANDROID_KEYSTORE_BASE64 }}
+          ANDROID_KEYSTORE_PASSWORD: ${{ secrets.ANDROID_KEYSTORE_PASSWORD }}
+          ANDROID_KEY_ALIAS: ${{ secrets.ANDROID_KEY_ALIAS }}
+          ANDROID_KEY_PASSWORD: ${{ secrets.ANDROID_KEY_PASSWORD }}
+        run: |
+          import os
+          names = ("ANDROID_KEYSTORE_BASE64", "ANDROID_KEYSTORE_PASSWORD",
+                   "ANDROID_KEY_ALIAS", "ANDROID_KEY_PASSWORD")
+          missing = [name for name in names if not os.environ.get(name)]
+          if missing:
+              raise ValueError("Missing repository signing secrets: " + ", ".join(missing))
+
+      - name: Resolve artifact version
+        id: version
+        shell: python
+        run: |
+          import datetime
+          import os
+          import re
+          version = os.environ["VERSION"]
+          if os.environ["GITHUB_EVENT_NAME"] == "workflow_dispatch" and not version:
+              tag = os.environ["SOURCE_TAG"]
+              if not tag.startswith("android-v"):
+                  raise ValueError("Use an existing android-v<app-version>-YYYYMMDD release")
+              version = tag.removeprefix("android-")
+          match = re.fullmatch(r"v[0-9]+\.[0-9]+\.[0-9]+-([0-9]{8})", version)
+          if not match:
+              raise ValueError("Invalid Android artifact version")
+          datetime.datetime.strptime(match[1], "%Y%m%d")
+          with open(os.environ["GITHUB_OUTPUT"], "a") as stream:
+              stream.write(f"version={version}\n")
+
+      - name: Download unsigned build artifact
+        if: github.event_name != 'workflow_dispatch' || inputs.version != ''
+        uses: actions/download-artifact@v8
+        with:
+          name: crossdesk-android-arm64-unsigned-${{ steps.version.outputs.version }}
+          path: unsigned
+
+      - name: Download unsigned APK from existing release
+        if: github.event_name == 'workflow_dispatch' && inputs.version == ''
+        env:
+          GH_TOKEN: ${{ github.token }}
+          APK_VERSION: ${{ steps.version.outputs.version }}
+        run: |
+          gh release view "${SOURCE_TAG}" --repo "${GITHUB_REPOSITORY}" \
+            --json isDraft,isPrerelease > release.json
+          python3 - <<'PY'
+          import json
+          from pathlib import Path
+          release = json.loads(Path('release.json').read_text())
+          if release['isDraft'] or release['isPrerelease']:
+              raise ValueError('Use a published stable Android release')
+          PY
+          gh release download "${SOURCE_TAG}" --repo "${GITHUB_REPOSITORY}" \
+            --pattern "crossdesk-android-arm64-unsigned-${APK_VERSION}.apk" --dir unsigned
+
+      - name: Set up Java
+        uses: actions/setup-java@v5
+        with:
+          distribution: temurin
+          java-version: "17"
+
+      - name: Set up Android signing tools
+        uses: android-actions/setup-android@v3
+        with:
+          packages: "build-tools;36.0.0"
+
+      # This job never checks out or executes application source with the key present.
+      - name: Align, sign and verify Release APK
+        env:
+          APK_VERSION: ${{ steps.version.outputs.version }}
+          ANDROID_KEYSTORE_BASE64: ${{ secrets.ANDROID_KEYSTORE_BASE64 }}
+          ANDROID_KEYSTORE_PASSWORD: ${{ secrets.ANDROID_KEYSTORE_PASSWORD }}
+          ANDROID_KEY_ALIAS: ${{ secrets.ANDROID_KEY_ALIAS }}
+          ANDROID_KEY_PASSWORD: ${{ secrets.ANDROID_KEY_PASSWORD }}
+        run: |
+          umask 077
+          crossdesk_signing_dir="$(mktemp -d "${RUNNER_TEMP}/crossdesk-signing.XXXXXX")"
+          trap 'rm -rf -- "${crossdesk_signing_dir}"' EXIT
+          printf '%s' "${ANDROID_KEYSTORE_BASE64}" | base64 --decode > "${crossdesk_signing_dir}/release.keystore"
+          crossdesk_tools="${ANDROID_HOME}/build-tools/36.0.0"
+          crossdesk_output="${RUNNER_TEMP}/crossdesk-android-signed"
+          mkdir -p "${crossdesk_output}"
+          "${crossdesk_tools}/zipalign" -P 16 -f -v 4 \
+            "unsigned/crossdesk-android-arm64-unsigned-${APK_VERSION}.apk" \
+            "${crossdesk_signing_dir}/aligned.apk"
+          "${crossdesk_tools}/apksigner" sign \
+            --ks "${crossdesk_signing_dir}/release.keystore" \
+            --ks-key-alias "${ANDROID_KEY_ALIAS}" \
+            --ks-pass env:ANDROID_KEYSTORE_PASSWORD --key-pass env:ANDROID_KEY_PASSWORD \
+            --out "${crossdesk_output}/crossdesk-android-arm64-${APK_VERSION}.apk" \
+            "${crossdesk_signing_dir}/aligned.apk"
+          "${crossdesk_tools}/apksigner" verify --verbose --print-certs \
+            "${crossdesk_output}/crossdesk-android-arm64-${APK_VERSION}.apk"
+          "${crossdesk_tools}/zipalign" -c -P 16 -v 4 \
+            "${crossdesk_output}/crossdesk-android-arm64-${APK_VERSION}.apk"
+
+      - name: Upload signed Release APK
+        uses: actions/upload-artifact@v6
+        with:
+          name: crossdesk-android-arm64-${{ steps.version.outputs.version }}
+          path: ${{ runner.temp }}/crossdesk-android-signed/*.apk
+          if-no-files-found: error
+
+      - name: Summarize signing
+        env:
+          APK_VERSION: ${{ steps.version.outputs.version }}
+        run: |
+          echo "Android ${APK_VERSION}: Release APK signed with the fixed publishing key; APK signature and 16 KB ZIP alignment verified." >> "${GITHUB_STEP_SUMMARY}"
+          if [[ "${GITHUB_EVENT_NAME}" == "workflow_dispatch" && -z "${VERSION}" ]]; then
+            echo "Signed an existing release without rebuilding. Download the signed Actions artifact to publish it." >> "${GITHUB_STEP_SUMMARY}"
+          fi

.github/workflows/update-version-json.yml

@@ -0,0 +1,89 @@
+name: Update version.json from Release
+
+on:
+  release:
+    types: [published, edited]
+  workflow_dispatch:
+    inputs:
+      source_tag:
+        description: "Existing version tag whose assets and metadata should be uploaded to the server."
+        required: true
+        type: string
+
+permissions:
+  contents: read
+
+jobs:
+  update-version-json:
+    name: Upload release downloads and update version.json
+    if: github.event_name == 'workflow_dispatch' || (github.event.release.tag_name != 'latest' && !github.event.release.prerelease)
+    runs-on: ubuntu-24.04
+    concurrency:
+      group: publish-release-metadata
+      cancel-in-progress: false
+    env:
+      GH_TOKEN: ${{ github.token }}
+      RELEASE_TAG: ${{ inputs.source_tag || github.event.release.tag_name }}
+    steps:
+      - name: Checkout publishing scripts
+        uses: actions/checkout@v5
+        with:
+          ref: ${{ github.event.repository.default_branch }}
+
+      - name: Verify release manifest updates
+        run: python3 -B -m unittest discover -s .github/scripts -p 'test_*.py' -v
+
+      - name: Download release information and assets
+        shell: bash
+        run: |
+          python3 - <<'PY'
+          import os
+          import re
+          if not re.fullmatch(r'(?:ios-|android-)?v[0-9]+(?:\.[0-9]+){1,3}(?:-[0-9]+)*', os.environ['RELEASE_TAG']):
+              raise ValueError('Use a desktop, iOS or Android version tag')
+          PY
+          gh release view "${RELEASE_TAG}" --repo "${GITHUB_REPOSITORY}" \
+            --json tagName,name,body,publishedAt,isDraft,isPrerelease > release.json
+          python3 - <<'PY'
+          import json
+          from pathlib import Path
+          release = json.loads(Path('release.json').read_text())
+          if release['isDraft'] or release['isPrerelease']:
+              raise ValueError('Only published stable releases update version.json')
+          PY
+          gh release download "${RELEASE_TAG}" --repo "${GITHUB_REPOSITORY}" \
+            --pattern 'crossdesk-*' --dir release
+
+      - name: Upload release assets to download server
+        uses: burnett01/rsync-deployments@5.2
+        with:
+          switches: -avzr --progress
+          path: release/*
+          remote_path: /var/www/html/downloads/
+          remote_host: ${{ secrets.SERVER_HOST }}
+          remote_user: ${{ secrets.SERVER_USER }}
+          remote_key: ${{ secrets.SERVER_KEY }}
+
+      - name: Download current version.json
+        shell: bash
+        run: |
+          curl --fail --silent --show-error --retry 3 --max-time 30 \
+            -H 'Cache-Control: no-cache' \
+            https://version.crossdesk.cn/version.json -o current-version.json
+
+      - name: Merge release version and download URLs
+        shell: bash
+        run: |
+          python3 .github/scripts/update_version_manifest.py \
+            --current current-version.json --output version.json --artifacts release \
+            --release-json release.json
+
+      - name: Upload version.json to server
+        uses: burnett01/rsync-deployments@5.2
+        with:
+          switches: -avzr
+          path: version.json
+          remote_path: /var/www/html/version/
+          remote_host: ${{ secrets.SERVER_HOST }}
+          remote_user: ${{ secrets.SERVER_USER }}
+          remote_key: ${{ secrets.SERVER_KEY }}

.gitignore

@@ -1,10 +1,15 @@
 # Xmake cache
 .xmake/
+.xmake-toolchain-cache/
 build/
+apps/ios/Vendor/
+apps/ios/DerivedData*/
+apps/ios/.xmake/
+xcuserdata/
+*.xcuserstate
 
 # MacOS Cache
 .DS_Store
 
 # VSCode cache
 .vscode
-continuous-desk.code-workspace

.gitmodules

@@ -1,3 +1,3 @@
-[submodule "thirdparty/projectx"]
-	path = thirdparty/projectx
-	url = git@github.com:dijunkun/projectx.git
+[submodule "deps/submodules/minirtc"]
+	path = deps/submodules/minirtc
+	url = https://github.com/kunkundi/minirtc.git

LICENSE

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
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+
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+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

PRIVACY.md

@@ -0,0 +1,159 @@
+# CrossDesk Privacy Policy
+
+Last updated: October 2, 2026
+
+[中文](#中文) | [English](#english)
+
+## 中文
+
+更新日期：2026 年 10 月 2 日
+
+CrossDesk 重视您的个人信息与隐私保护。本政策说明我们在提供远程桌面服务时如何处理相关信息，以及您可以如何管理授权、保存的内容和数据请求。请在使用前阅读并了解本政策。
+
+### 一、适用范围
+
+本政策适用于 CrossDesk 桌面客户端、iOS 与 Android 客户端，以及由 CrossDesk 项目维护者（以下简称“我们”）提供的默认网络服务。
+
+如果您选择自行部署或使用其他运营者提供的服务器，该服务器所处理的信息、保存期限及安全管理由相应运营者负责。请在使用前了解其隐私政策。本政策中有关客户端本地数据处理的说明仍适用。
+
+### 二、我们处理的信息及用途
+
+**设备连接与身份验证。** 为登记设备、验证连接权限、查询在线状态及建立远程连接，客户端与服务端会处理设备 ID、认证信息及在线状态。服务端还会保存设备身份及认证校验信息、在线与离线时间、客户端版本与平台、设备关联记录，并生成必要的运行和安全日志，用于维持服务、排查故障及防止滥用。
+
+**必要的网络信息。** 建立连接、网络地址转换穿透及中继转发需要处理 IP 地址、端口等网络信息。这些信息用于通信和网络诊断，不等同于读取设备的定位权限。连接服务、中继服务及网络请求可能产生相应日志。
+
+**远程会话内容。** 您发起或接受远程连接后，软件根据使用的功能在参与会话的设备之间传输画面、音频、键盘和鼠标操作、剪贴板文本及文件。会话内容可能包含个人或工作信息，请仅连接您拥有或已获授权使用的设备，并按需管理共享内容。
+
+**版本检查。** 桌面客户端启动后会获取版本信息；iOS 与 Android 客户端在连接成功并收到远端版本信息后，会获取最新桌面版本信息，用于提示升级。该请求不携带设备 ID 或远端版本号，但网络服务会处理完成请求所必需的网络信息。
+
+CrossDesk 未集成广告投放、广告追踪或用户行为分析功能。客户端不会主动上传诊断日志、崩溃报告或用户行为分析数据。您主动向我们提交问题或日志时，请先移除与问题无关的个人信息及连接凭据。
+
+### 三、数据传输与相关服务
+
+我们提供设备登记、连接协商、中继转发及版本检查服务。即使您使用自托管连接服务，客户端仍会按前述条件访问我们提供的版本服务。
+
+远程会话内容优先在参与会话的设备间直接传输，必要时通过配置的中继服务器转发。中继服务用于实时转发，不提供会话录像或文件归档。客户端本地保存的画面预览和接收文件，按本政策相关说明处理。
+
+自托管服务器由您选择的运营者管理。更换连接服务器后，设备登记、连接协商及中继数据将由相应运营者处理。
+
+### 四、信息保存与安全措施
+
+**客户端本地数据。** 软件会在本机保存连接设置、用户偏好、最近连接记录及必要的运行日志，以支持后续使用和故障排查。iOS 中的本机登录凭据及您选择记住的远程连接密码保存在系统钥匙串中，不通过 iCloud 钥匙串同步；旧版偏好中的本机登录凭据在成功迁入钥匙串后删除。
+
+Android 中的设备身份及您选择保存的访问密码使用 Android Keystore 密钥加密后保存在本机，应用本地数据不纳入设备备份。
+
+**远程画面预览。** iOS 与 Android 默认不保存远程画面预览。只有您在“设置 → 隐私”单独开启并确认后，才会从下一次连接起，每次连接保存一张远程画面，用于最近连接预览。预览仅保存在本机，不上传，并设置为不纳入设备备份。您可以单独清除预览；关闭保存或撤回隐私授权也会清除已有预览。旧版本未经此选择保存的预览会在升级后清理。
+
+**接收的文件。** iOS 接收文件保存在本应用的文件目录中，您可通过系统“文件”应用管理或删除。清除画面预览不会删除接收文件或最近连接记录。
+
+**服务端记录。** 为支持再次连接、服务运维和安全排查，设备身份、状态、关联记录及运行日志可能在连接结束后继续保存。保存范围和期限受服务运行需要、部署规则及适用的保留要求约束。您可以通过下述联系方式查询与您设备相关的信息及保存期限，或提出删除请求。撤回隐私授权、删除本地记录或卸载客户端，不会自动删除已产生的服务端记录；日志、备份和快照需分别核查和处理。
+
+iOS 通过系统钥匙串和文件保护机制保护相应本地数据，默认信令连接进行 TLS 证书校验。请妥善保管设备和连接凭据，避免向无关人员共享访问密码。
+
+Android 默认信令连接同样进行 TLS 证书校验。
+
+### 五、移动端权限与授权选择
+
+**隐私授权。** iOS 与 Android 首次使用，或从未提供此选择的旧版升级时，您需阅读本政策、主动勾选并点击同意后，客户端才会登记本机身份、连接信令服务和查询设备在线状态。拒绝后仍可查看设置、离线隐私政策和本地连接记录，远程连接功能暂不可用。未授权时，重新打开或从后台返回应用会再次提示。
+
+**撤回同意。** 您可以在“设置 → 隐私 → 隐私与授权”中查看隐私政策、授权状态或撤回授权。客户端将停止远程会话、信令连接和版本检查，关闭并清除本地画面预览。再次使用连接功能前需重新同意；重新同意不会自动开启画面预览保存。撤回不影响撤回前已经发生的信息处理，也不等同于删除服务端数据。
+
+**系统权限与会话功能。** iOS 客户端作为控制端接收远程电脑的画面与音频，不采集本机屏幕、摄像头或麦克风。局域网访问权限用于连接本地网络中的设备，您可在系统设置中管理。发送文件通过系统文件选择器选择，不要求开放整个文件库。当前 iOS 界面不读取或发送本机剪贴板文本；远端发送的剪贴板文本可在会话中写入本机剪贴板。
+
+Android 客户端同样作为控制端接收远程画面与音频，不采集本机屏幕、摄像头或麦克风，当前不支持文件传输。剪贴板文本仅在您主动发送或复制远端文本时传输或写入本机，会话结束时清除应用内缓存的远端剪贴板文本。
+
+应用及通信组件使用本地文件元数据、应用偏好和计时接口实现文件传输、设置保存及网络计时，不使用这些信息制作设备指纹或进行广告追踪。
+
+### 六、查询与删除请求
+
+您可以管理本地最近连接记录、保存的画面预览及接收文件。删除某条最近连接记录时，其预览及已保存的远程连接密码也会删除。
+
+如需查询、获取数据摘要或删除默认服务中与您设备相关的记录，请通过下述邮箱联系我们，说明设备 ID 和请求范围。为避免未经授权的披露或删除，我们会核实请求权限；请勿通过邮件发送访问密码、私钥或其他敏感凭据。
+
+删除服务端设备身份后，原身份及对应凭据将失效，再次连接可能登记为新设备。数据库记录的删除不表示日志、备份或其他设备上已接收的内容同时删除。使用自托管服务时，请向相应服务器运营者提出服务端数据请求。
+
+### 七、政策更新与联系方式
+
+本政策可能随功能及服务方式调整而更新，更新后的内容和日期将在隐私政策中公布。您可随时在应用设置中查阅当前随应用提供的政策文本。
+
+如对本政策或个人信息处理有疑问，请联系：
+
+邮箱：[junkun.di@hotmail.com](mailto:junkun.di@hotmail.com)
+
+---
+
+## English
+
+Updated: October 2, 2026
+
+CrossDesk respects your privacy. This policy explains how information is processed when we provide remote desktop services and how you can manage consent, locally saved content and data requests. Please read this policy before using the software.
+
+### 1. Scope
+
+This policy applies to the CrossDesk desktop, iOS and Android clients and the default network services provided by the CrossDesk project maintainers ("we" or "us").
+
+If you deploy your own server or choose a server provided by another operator, that operator is responsible for its data processing, retention and security practices. Please review its privacy policy before use. The descriptions of local client data processing in this policy still apply.
+
+### 2. Information processed and its purposes
+
+**Device connections and authentication.** To register devices, verify connection permissions, query availability and establish remote connections, the clients and server process device IDs, authentication information and presence. The server also retains device identity and authentication verification records, online and offline times, client versions and platforms, and device associations. Necessary operational and security logs support service operation, troubleshooting and abuse prevention.
+
+**Necessary network information.** Connections, network address translation traversal and relay forwarding require IP addresses, ports and other network information. This supports communication and network diagnostics and does not involve reading the device's location permission. Connection services, relay services and network requests may generate related logs.
+
+**Remote-session content.** After you initiate or accept a remote connection, the software transfers content between participating devices according to the features used. This includes screens, audio, keyboard and mouse input, clipboard text and files. Such content may contain personal or work information. Connect only to devices you own or are authorized to access, and manage shared content accordingly.
+
+**Version checks.** The desktop client retrieves release information after startup. After connecting and receiving the remote host's version, the iOS and Android clients retrieve the latest desktop release information to suggest updates. These requests do not contain device IDs or the remote host's version, but the service processes network information necessary to complete the request.
+
+CrossDesk does not integrate advertising, advertising tracking or behavioral analytics. The clients do not proactively upload diagnostic logs, crash reports or behavioral analytics data. If you choose to submit an issue or logs, remove unrelated personal information and connection credentials first.
+
+### 3. Data transmission and related services
+
+We provide device registration, connection negotiation, relay forwarding and version checks. Even when you use a self-hosted connection service, the client still accesses our version service under the conditions described above.
+
+Remote-session content is transmitted directly between participating devices where possible, or through the configured relay server when needed. The relay service forwards content in real time and does not provide session recording or file archiving. Locally saved previews and received files are handled as described in this policy.
+
+Self-hosted servers are managed by the operator you choose. If you change the connection server, the corresponding operator will process device registration, connection negotiation and relay data.
+
+### 4. Storage and security measures
+
+**Local client data.** The software stores connection settings, preferences, recent connections and necessary operational logs on the device for subsequent use and troubleshooting. On iOS, local login credentials and remote connection passwords you choose to remember are stored in the system Keychain without iCloud Keychain synchronization. Legacy local login credentials in preferences are removed after successful migration to the Keychain.
+
+On Android, device identities and access passwords you choose to save are encrypted with Android Keystore keys and stored locally. The app's local data is excluded from device backups.
+
+**Remote desktop previews.** Saving previews is off by default on iOS and Android. Only after you separately enable and confirm it in Settings → Privacy will the app save one remote frame per connection, starting with the next connection, for recent-connection previews. Previews remain local, are not uploaded and are marked as excluded from device backups. You can clear them separately. Disabling saving or withdrawing network consent also clears them. Previews saved by older versions without this choice are cleared on upgrade.
+
+**Received files.** Received files on iOS are stored in the app's file directory and can be managed or deleted through Files. Clearing previews does not delete received files or recent-connection records.
+
+**Server records.** Device identities, presence, associations and operational logs may remain after a connection ends to support reconnection, service operation and security troubleshooting. Their scope and retention depend on operational needs, deployment rules and applicable retention requirements. You can contact us below to ask about records and retention periods related to your device or request deletion. Withdrawing network consent, deleting local records or uninstalling the client does not automatically delete existing server records. Logs, backups and snapshots require separate review and handling.
+
+On iOS, the system Keychain and file protection mechanisms protect the relevant local data, and default signaling connections validate TLS certificates. Keep your devices and connection credentials secure and avoid sharing access passwords with unrelated people.
+
+Default signaling connections on Android also validate TLS certificates.
+
+### 5. Mobile permissions and consent choices
+
+**Privacy authorization.** On first use of iOS or Android, or when upgrading from a version without this choice, you must read this policy, actively select the checkbox and agree before the client registers a local identity, connects to signaling or queries device presence. If you decline, settings, the offline policy and local connection history remain available, while remote connections are unavailable. Without consent, reopening the app or returning from the background presents the notice again.
+
+**Withdrawal.** You can review the privacy policy and your authorization status or withdraw consent in Settings → Privacy → Privacy and Authorization. The client stops remote sessions, signaling and version checks, disables preview saving and clears local previews. Consent is required again before reconnecting. Agreeing again does not automatically enable preview saving. Withdrawal does not undo processing that already occurred or delete server data.
+
+**System permissions and session features.** The iOS client receives remote computer screens and audio as a controller; it does not capture the local screen, camera or microphone. Local network access supports connections to devices on your network and can be managed in system settings. File sending uses the system document picker without requiring access to the entire file library. The current iOS interface does not read or send local clipboard text. Text sent by the remote device may be written to the local clipboard during a session.
+
+The Android client also receives remote screens and audio as a controller and does not capture the local screen, camera or microphone. It currently does not support file transfer. Clipboard text is transmitted or written locally only when you explicitly send text or copy remote text. The app clears cached remote clipboard text when the session ends.
+
+The app and its communication components use local file metadata, preferences and timing APIs for file transfer, settings and network timing, not for device fingerprinting or advertising tracking.
+
+### 6. Access and deletion requests
+
+You can manage local recent connections, saved previews and received files. Removing a recent connection also removes its preview and remembered remote connection password.
+
+To request access to information, a data summary or deletion of records associated with your device in the default service, contact the email address below with the device ID and scope of your request. We verify the requester's authority to avoid unauthorized disclosure or deletion. Do not send access passwords, private keys or other sensitive credentials by email.
+
+Deleting a server-side device identity invalidates that identity and its credentials; reconnecting may register a new device. Deleting database records does not mean that logs, backups or content already received by other devices are also deleted. For a self-hosted service, direct server-side data requests to its operator.
+
+### 7. Policy changes and contact
+
+This policy may be updated as features and services change. Updated text and its date will be published in the privacy policy. You can review the policy bundled with your app in its settings at any time.
+
+For questions about this policy or the processing of personal information, contact:
+
+Email: [junkun.di@hotmail.com](mailto:junkun.di@hotmail.com)

README.md

@@ -0,0 +1,247 @@
+<div align="center">
+  <img src="apps/desktop/resources/linux/crossdesk_128x128.png" width="80" alt="CrossDesk 标志" />
+  <h1>CrossDesk</h1>
+  <p>轻量、跨平台的远程桌面，让电脑、浏览器和 iPhone / iPad 连接到同一张桌面。</p>
+  <p><a href="https://www.crossdesk.cn/">官方网站</a> · <a href="https://github.com/kunkundi/crossdesk/releases">下载客户端</a> · <a href="https://web.crossdesk.cn/">打开 Web 客户端</a> · <a href="README_EN.md">English</a></p>
+</div>
+
+<div align="center">
+
+[![Platforms](https://img.shields.io/badge/platform-Windows%20%7C%20macOS%20%7C%20Linux%20%7C%20iOS%20%7C%20Android-blue)](#download)
+[![Release](https://img.shields.io/github/v/release/kunkundi/crossdesk)](https://github.com/kunkundi/crossdesk/releases)
+[![Build](https://github.com/kunkundi/crossdesk/actions/workflows/build.yml/badge.svg)](https://github.com/kunkundi/crossdesk/actions/workflows/build.yml)
+[![License: GPL v3](https://img.shields.io/badge/license-GPL--3.0-blue)](LICENSE)
+[![Stars](https://img.shields.io/github/stars/kunkundi/crossdesk?style=social)](https://github.com/kunkundi/crossdesk/stargazers)
+
+</div>
+
+CrossDesk 支持 Windows、macOS、Linux 之间的远程访问，也可从浏览器或原生 iOS / Android 客户端控制电脑。项目基于 [MiniRTC](https://github.com/kunkundi/minirtc)，提供实时音视频传输、键鼠控制、文件传输与自托管能力，仍在持续开发中。
+
+> 本文按当前仓库代码整理。截图展示当前 Slint 桌面界面，使用演示 ID、密码、在线状态和连接记录；缩略图来自公开页面；下载包的功能与系统要求请同时核对对应 Release 说明。原生 iOS 客户端的构建、签名方式见下文。
+
+[界面预览](#preview) · [下载与安装](#download) · [快速连接](#quick-start) · [会话操作](#session) · [设置](#settings) · [iOS](#ios) · [Android](#android) · [自托管](#self-hosting) · [源码构建](docs/BUILD.md) · [常见问题](docs/FAQ.md)
+
+<a id="preview"></a>
+
+## 界面预览
+
+### 桌面客户端
+
+主窗口集中展示本机 ID、连接密码、远程连接入口和近期连接记录。
+
+<p align="center">
+  <img src="docs/images/desktop-main-zh.png" width="800" alt="当前桌面客户端示例：已连接服务器，三台在线设备均显示页面缩略图" />
+</p>
+
+### Web 客户端
+
+在浏览器中输入远程设备 ID 和密码，无需在控制端安装桌面客户端。
+
+<p align="center">
+  <img src="docs/images/web-client.png" width="800" alt="CrossDesk Web 客户端当前连接首页" />
+</p>
+
+图片来源与更新方式见 [截图说明](docs/images/README.md)。
+
+## 主要功能
+
+| 能力 | 当前支持 |
+| --- | --- |
+| 跨平台控制 | Windows / macOS / Linux 桌面互控；浏览器与原生 iOS / Android 作为控制端 |
+| 实时画面与声音 | H.264 / AV1、硬件编解码、远端声音播放；会话中可调整画质、30 / 60 fps 与画面偏好 |
+| 多设备与多显示器 | 近期连接、设备别名、会话标签与远端显示器切换 |
+| 输入与协作 | 键鼠输入、远端光标同步、组合键、文本剪贴板同步、文件传输 |
+| 网络与部署 | P2P 直连、TURN 中继与强制中继、SRTP 媒体加密、自托管信令与中继服务 |
+| 隐私屏 | 被连接时自动开启，或在会话工具栏切换；可用性取决于被控端系统与采集方式 |
+| Windows 锁屏控制 | 通过 CrossDesk Service 支持锁屏、登录界面及安全桌面的输入转发 |
+| Linux 无头运行 | 复用已有桌面和应用，或创建独立 Xvfb 虚拟桌面；终端控制台可查看状态、修改密码和设置，见 [运行说明](docs/HEADLESS.md) |
+
+各客户端的入口和能力有所不同；桌面会话操作见下文，iOS 的具体功能见 [开发说明](apps/ios/README.md)。
+
+<a id="download"></a>
+
+## 下载与安装
+
+前往 [GitHub Releases](https://github.com/kunkundi/crossdesk/releases) 或 [官方网站](https://www.crossdesk.cn/)，按系统与 CPU 架构选择安装包。
+
+| 平台 | 当前源码 / CI 基线 | 安装方式 |
+| --- | --- | --- |
+| Windows | Windows 10+，x64 | `.exe` 安装包；便携构建也受支持 |
+| macOS | macOS 14.0+，Intel / Apple Silicon | 选择 x64 或 arm64 的 `.pkg` |
+| Linux | Ubuntu 20.04+，amd64 / arm64，glibc 2.31 基线 | `.deb` 安装包 |
+| iOS / iPadOS | iOS 16.0+，arm64 真机 | 原生客户端；使用 Xcode 构建并签名，CI 产物为未签名应用 |
+| Android | Android 8.0+，arm64 | 原生控制端；使用 Gradle 构建 APK，见 [开发说明](apps/android/README.md) |
+| Web | 支持 WebRTC 的浏览器 | 访问 [web.crossdesk.cn](https://web.crossdesk.cn/) |
+
+Linux 下载后，在下载目录中将文件名替换为实际安装包名称：
+
+```bash
+sudo apt install "./crossdesk-linux-amd64-<version>.deb"
+```
+
+**macOS 首次运行：** 按应用提示，在“系统设置 → 隐私与安全性”中授予 CrossDesk **屏幕录制**（新系统可能显示为“屏幕与系统音频录制”）及 **辅助功能**权限，再按系统提示重新打开应用。前者用于捕获桌面，后者用于远程键鼠输入。
+
+<a id="quick-start"></a>
+
+## 快速连接
+
+### 从另一台电脑连接
+
+1. **准备被控电脑。** 安装并运行 CrossDesk，等待底部显示“已连接服务器”。在左侧“本桌面”查看 **本机 ID** 和 **密码**，提供给控制端。
+2. **输入对端 ID。** 在控制端右侧“远程桌面 → 对端 ID”输入被控电脑的 ID，点击 **→**。
+3. **完成密码验证。** 按弹窗输入被控电脑当前的连接密码，确认后等待远程画面出现。需要保存密码时勾选“记住密码”。
+4. **再次连接。** 成功连接过的设备会出现在“近期连接”中，可通过卡片重连，也可编辑别名或删除记录。
+
+本机密码旁的眼睛按钮用于显示 / 隐藏密码，刷新按钮用于生成新的随机密码，铅笔按钮用于手动修改。密码统一为 **6 位数字或英文字母**。修改或刷新时需保持连接服务器；等待修改成功、客户端重新连接后，再复制当前密码。已保存旧密码的控制端需重新输入。
+
+### 从浏览器连接
+
+1. 保持被控电脑上的 CrossDesk 运行，并确认已连接服务器。
+2. 打开 [Web 客户端](https://web.crossdesk.cn/)，输入 **远程设备 ID** 和 **密码**，点击“连接”。
+3. 连接后使用页面提供的显示器、鼠标模式和键盘控件操作远端；手机和平板也可通过浏览器访问。
+
+如果使用自建服务器，需要让控制端与被控端接入同一服务；Web 部署配置见 [CrossDesk Web Client](https://github.com/kunkundi/crossdesk-web-client)。
+
+<a id="session"></a>
+
+## 会话中的常用操作
+
+远程窗口通过会话标签切换设备，控制栏提供以下操作；控制栏收起时先点击展开按钮。将鼠标悬停在图标上可查看提示。
+
+| 入口 | 用途 |
+| --- | --- |
+| 显示器 | 切换远端显示器 |
+| 键盘 | 发送组合键；Windows 的 `Ctrl+Alt+Del` 依赖远端服务 |
+| 鼠标 | 控制 / 释放远端鼠标 |
+| 扬声器 | 播放声音 / 静音 |
+| 文件夹 | 选择文件发送到远端，并查看传输进度 |
+| 画面设置 | 在当前会话中调整画面质量、采集帧率与画面偏好 |
+| 网络状态 | 查看流量、丢包率、帧率、分辨率、直连 / 中继及加密状态 |
+| 隐私屏 | 开启或关闭被控电脑的隐私屏；悬停查看当前状态与可用操作 |
+| 全屏 | 进入 / 退出全屏 |
+| 断开连接 | 结束当前远程会话 |
+
+桌面端可同步文本剪贴板。接收文件的位置可在“设置 → 文件保存路径”调整。关闭主窗口会隐藏窗口并保持程序运行；需要完全退出时使用系统托盘或菜单栏中的退出入口。
+
+### 在会话中调整画面
+
+连接成功后，点击工具栏中的 **画面设置**（滑杆图标），直接选择低 / 中 / 高画质、**30 / 60 fps**，以及帧率优先 / 画质优先 / 平衡。选项会发送给当前被控端，无需断开重连；实际画面效果取决于网络、设备与编码器能力。旧版被控端不支持时，菜单会提示并禁用选项。
+
+<p align="center">
+  <img src="docs/images/desktop-stream-video-settings-zh.png" width="800" alt="当前远程会话的画面设置菜单：画面质量、采集帧率与画面偏好；背景为公开页面演示图" />
+</p>
+
+<a id="settings"></a>
+
+## 客户端设置与更新
+
+点击主窗口右上角 **☰ → 设置**，修改后点击“确认”保存。编码与连接选项建议在建立连接前调整；会话进行中部分选项不可修改。设置列表可向下滚动，查看自托管、启动方式与文件保存路径。画质、帧率和画面偏好在远程会话工具栏中调整。
+
+<p align="center">
+  <img src="docs/images/desktop-settings-zh.png" width="720" alt="当前客户端设置：编码格式、硬件编解码、中继、强制中继与自动隐私屏" />
+</p>
+
+| 设置 | 说明 |
+| --- | --- |
+| 语言 | 中文、English、Русский |
+| 采集方式（Windows） | 自动 / DXGI / WGC / GDI；无显示器主机使用“自动”启用自动适配 |
+| 视频编码格式 | H.264 / AV1；硬件编解码是否可用取决于平台、硬件与构建选项 |
+| 启用中继服务 | 允许借助 TURN 中继建立连接；P2P 连接失败时先检查此项 |
+| 强制中继连接 | 启用中继服务后可勾选，让连接通过中继建立；关闭中继服务会同时关闭此项 |
+| 保存远程画面预览 | 默认开启，保存远程画面预览；关闭后缩略图区域显示被控端平台，并清除已有预览，保留连接记录和密码 |
+| 被连接时开启隐私屏 | 设置本机被远程连接时是否自动启用隐私屏；会话中可从控制端工具栏切换 |
+| 自托管配置 | 填写服务器地址和信令服务端口，并勾选启用 |
+| 开机自启 / 启用守护进程 | 调整启动与进程守护行为，按界面提示重启后生效 |
+| 文件保存路径 | 选择接收文件的目录 |
+
+### 检查更新
+
+客户端启动后会在后台检查版本。发现新版本时，主窗口菜单入口会显示更新提示；打开 **☰ → 关于** 可查看版本，也可点击 **检查更新** 手动检查。发现更新后可查看更新说明并前往下载页面。
+
+<p align="center">
+  <img src="docs/images/desktop-about-zh.png" width="720" alt="关于窗口与检查更新按钮，版本号和检查结果为演示数据" />
+</p>
+
+<a id="ios"></a>
+
+## 原生 iOS / iPadOS 客户端
+
+仓库的 [`apps/ios`](apps/ios/README.md) 提供原生控制端，与桌面端使用同一套 MiniRTC 协议。它可以控制远端电脑；当前不提供将 iPhone / iPad 作为被控桌面的功能。
+
+1. 按 [iOS 开发说明](apps/ios/README.md) 使用 Xcode 构建并签名，安装到 iOS 16+ 的真机。
+2. 在首页输入对端 ID，点击连接并填写密码；成功连接后可从“最近连接”中重连。
+3. 在设置中选择鼠标模式：**相对位置**像触控板一样移动光标，**绝对位置**将触摸位置直接映射到远端画面。
+4. 点击悬浮图标展开菜单，可切换显示器、显示键盘、控制声音或发送文件。收到的文件位于应用的 `Documents/Received`，可通过传输状态旁的分享按钮导出。
+
+当前支持接收远端文本到 iOS 剪贴板；界面暂未提供主动发送本机剪贴板的按钮。
+
+当前支持单指点击、双指右键、长按拖动与捏合缩放；缩放后的双指平移用于移动视图。原生端与浏览器端分别维护，使用入口和手势可能不同。
+
+<a id="android"></a>
+
+## 原生 Android 控制端
+
+[`apps/android`](apps/android/README.md) 提供独立 Android Studio / Gradle 工程，复用 MiniRTC 和桌面键鼠协议。支持连接电脑、H.264 / AV1 画面、声音、触控/外接键鼠、多屏切换和文本剪贴板。当前面向 Android 8.0+ arm64 设备，使用软件解码；尚未提供手机被控、文件传输和 iOS 全部附加功能。
+
+按 [Android 开发说明](apps/android/README.md) 构建并安装 APK，在首页填写电脑端的设备 ID 和密码即可连接。长按右键、双指滚动，横屏可扩大画面；切换到后台会结束会话。
+
+<a id="windows-service"></a>
+
+## Windows 锁屏与登录界面
+
+**CrossDesk Service**（服务名 `CrossDeskService`）提供锁屏、登录、凭据输入及安全桌面的状态上报、`Ctrl+Alt+Del` 发送和键鼠输入转发。
+
+安装版会注册按需启动的服务，客户端启动时尝试启动它；本机没有 CrossDesk 客户端进程后服务会自动退出。便携版可在提示窗口或“设置 → 锁屏控制服务”中安装服务，需要管理员权限。该服务依赖客户端运行。
+
+<details>
+<summary>手动部署与服务管理命令</summary>
+
+保留完整安装目录；自行部署构建产物时，将 `CrossDesk.exe`、`crossdesk_service.exe`、`crossdesk_session_helper.exe` 及同次构建输出的全部 `.dll` 放在同一目录。在该目录打开管理员 PowerShell，按需执行：
+
+```powershell
+.\CrossDesk.exe --service-install
+.\CrossDesk.exe --service-start
+.\CrossDesk.exe --service-status
+.\CrossDesk.exe --service-ping
+# 停止或卸载服务
+.\CrossDesk.exe --service-stop
+.\CrossDesk.exe --service-uninstall
+```
+
+</details>
+
+出现“远端 Windows 服务不可用”时，检查被控电脑的安装和服务状态；普通桌面连接仍可使用，受保护界面的控制能力会受限。
+
+<a id="self-hosting"></a>
+
+## 自托管服务器
+
+可自行部署信令服务与 TURN 中继，并在桌面客户端 **☰ → 设置 → 自托管配置** 中填写连接信息。控制端与被控端都需要启用同一套配置。
+
+- [自托管指南](docs/SELF_HOSTING.md)：当前 Compose 部署入口、客户端设置、证书信任与排查。
+- [CrossDesk Server](https://github.com/kunkundi/crossdesk-server)：服务端源码与发布配置。
+- [CrossDesk Web Client](https://github.com/kunkundi/crossdesk-web-client)：浏览器端源码与自托管说明。
+
+## 开发与反馈
+
+- [源码构建](docs/BUILD.md)：Windows、macOS、Linux、可选编译参数与打包。
+- [iOS 开发说明](apps/ios/README.md)：原生端构建和真机验证。
+- [Android 开发说明](apps/android/README.md)：APK 构建、安装与模拟器验证。
+- [GUI 架构](docs/gui-architecture.md)：桌面 UI、平台实现与工程结构。
+- [常见问题](docs/FAQ.md)：连接失败、黑屏、文件位置与编译问题。
+- [提交问题](https://github.com/kunkundi/crossdesk/issues)：请附上两端系统、客户端版本、连接方式和可复现步骤。
+
+## 致谢与许可
+
+感谢 [HelloGitHub](https://hellogithub.com/)、[阮一峰的科技爱好者周刊](https://github.com/ruanyf/weekly) 与 [LinuxDo](https://linux.do) 社区的推荐、交流与支持。
+
+CrossDesk 使用 [GPL-3.0](LICENSE) 许可。隐私说明见 [隐私政策](PRIVACY.md#中文)。
+
+### Code signing policy
+
+CrossDesk 使用 SignPath.io 为本仓库构建的官方 Windows 发布包提供代码签名。
+
+**Free code signing provided by [SignPath.io](https://signpath.io/), certificate by [SignPath Foundation](https://signpath.org/).**
+
+- **Committers and reviewers（代码提交与审核）：** [kunkundi](https://github.com/kunkundi)
+- **Approvers（签名审批）：** [kunkundi](https://github.com/kunkundi)

README_EN.md

@@ -0,0 +1,243 @@
+<div align="center">
+  <img src="apps/desktop/resources/linux/crossdesk_128x128.png" width="80" alt="CrossDesk logo" />
+  <h1>CrossDesk</h1>
+  <p>A lightweight, cross-platform remote desktop for computers, browsers, and iPhone / iPad.</p>
+  <p><a href="https://www.crossdesk.cn/">Website</a> · <a href="https://github.com/kunkundi/crossdesk/releases">Download</a> · <a href="https://web.crossdesk.cn/">Open Web Client</a> · <a href="README.md">中文</a></p>
+</div>
+
+<div align="center">
+
+[![Platforms](https://img.shields.io/badge/platform-Windows%20%7C%20macOS%20%7C%20Linux%20%7C%20iOS%20%7C%20Android-blue)](#download)
+[![Release](https://img.shields.io/github/v/release/kunkundi/crossdesk)](https://github.com/kunkundi/crossdesk/releases)
+[![Build](https://github.com/kunkundi/crossdesk/actions/workflows/build.yml/badge.svg)](https://github.com/kunkundi/crossdesk/actions/workflows/build.yml)
+[![License: GPL v3](https://img.shields.io/badge/license-GPL--3.0-blue)](LICENSE)
+[![Stars](https://img.shields.io/github/stars/kunkundi/crossdesk?style=social)](https://github.com/kunkundi/crossdesk/stargazers)
+
+</div>
+
+CrossDesk connects Windows, macOS, and Linux desktops, with browser and native iOS / Android clients for controlling computers. Built on [MiniRTC](https://github.com/kunkundi/minirtc), it supports real-time video and audio, keyboard and mouse control, file transfer, and self-hosting. The project is under active development.
+
+> This guide follows the current repository source. Desktop screenshots render the current Slint UI with sample IDs, passwords, online statuses, and recent devices; thumbnails show public pages. Check each release's notes for the features and requirements of its binaries. Native iOS build and signing instructions are below.
+
+[Preview](#preview) · [Download](#download) · [Quick start](#quick-start) · [Session controls](#session) · [Settings](#settings) · [iOS](#ios) · [Self-hosting](#self-hosting) · [Build](docs/BUILD_EN.md) · [FAQ](docs/FAQ.md#english)
+
+<a id="preview"></a>
+
+## Preview
+
+### Desktop client
+
+The main window brings together your device ID, connection password, remote connection entry, and recent devices.
+
+<p align="center">
+  <img src="docs/images/desktop-main-en.png" width="800" alt="Current desktop UI example showing a connected server and three online devices with page thumbnails" />
+</p>
+
+### Web client
+
+Enter a remote device ID and password in your browser without installing the desktop app on the controlling device.
+
+<p align="center">
+  <img src="docs/images/web-client.png" width="800" alt="Current CrossDesk Web Client connection page in Chinese" />
+</p>
+
+See the [screenshot notes](docs/images/README.md) for image sources and refresh instructions.
+
+## Features
+
+| Capability | Current support |
+| --- | --- |
+| Cross-platform control | Windows / macOS / Linux desktop control; browser and native iOS / Android controllers |
+| Live video and audio | H.264 / AV1, hardware codecs, and remote audio; adjust quality, 30 / 60 fps, and video preference during a session |
+| Devices and displays | Recent connections, device aliases, session tabs, and remote display switching |
+| Input and sharing | Keyboard/mouse input, remote cursor synchronization, shortcuts, text clipboard synchronization, and file transfer |
+| Networking and deployment | Direct P2P connections, TURN relay and forced relay, SRTP media encryption, and self-hosted signaling/relay services |
+| Privacy screen | Enable automatically when connected to, or toggle from the session toolbar; availability depends on the host OS and capture method |
+| Windows protected desktops | CrossDesk Service forwards input on lock screens, sign-in screens, and secure desktops |
+| Linux headless operation | Reuse existing desktops and applications or create separate Xvfb desktops; use the terminal console to check status and change passwords or settings; see [setup](docs/HEADLESS_EN.md) |
+
+Controls and capabilities vary by client. Desktop controls are described below; see the [iOS guide](apps/ios/README.md) for native mobile features.
+
+<a id="download"></a>
+
+## Download and install
+
+Choose a package matching your OS and CPU architecture from [GitHub Releases](https://github.com/kunkundi/crossdesk/releases) or the [website](https://www.crossdesk.cn/).
+
+| Platform | Current source / CI baseline | Installation |
+| --- | --- | --- |
+| Windows | Windows 10+, x64 | `.exe` installer; portable builds are also supported |
+| macOS | macOS 14.0+, Intel / Apple Silicon | x64 or arm64 `.pkg` |
+| Linux | Ubuntu 20.04+, amd64 / arm64, glibc 2.31 baseline | `.deb` package |
+| iOS / iPadOS | iOS 16.0+, arm64 physical device | Native controller; build and sign with Xcode, or sign the unsigned CI app |
+| Android | Android 8.0+, arm64 | Native controller; build an APK with Gradle ([guide](apps/android/README.md)) |
+| Web | A WebRTC-capable browser | Open [web.crossdesk.cn](https://web.crossdesk.cn/) |
+
+On Linux, replace the example filename with the downloaded package name:
+
+```bash
+sudo apt install "./crossdesk-linux-amd64-<version>.deb"
+```
+
+**First launch on macOS:** follow the app prompts to grant **Screen Recording** (called **Screen & System Audio Recording** on newer systems) and **Accessibility** under **System Settings → Privacy & Security**. Reopen the app if prompted. These permissions allow desktop capture and remote keyboard/mouse input respectively.
+
+<a id="quick-start"></a>
+
+## Quick start
+
+### Connect from another computer
+
+1. **Prepare the host.** Install and run CrossDesk on the computer to control. Wait for the bottom status bar to show that the server is connected. Share the **Local ID** and **Password** shown under **Local Desktop** with the controller.
+2. **Enter the remote ID.** On the controlling computer, enter the host's ID in **Remote Desktop → Remote ID**, then click **→**.
+3. **Verify the password.** Enter the host's current connection password when prompted and confirm. Select **Remember password** if you want to save it.
+4. **Reconnect later.** Previously connected devices appear under **Recent Connections**. Reconnect from a card, edit its alias, or remove its record.
+
+The eye button shows or hides the local password, the refresh button generates a new random password, and the pencil button lets you edit it. Passwords use **6 ASCII letters or digits**. Stay connected to the server when editing or refreshing a password. Wait for the change to succeed and the client to reconnect, then copy the current password. Controllers that saved the old password must enter it again.
+
+### Connect from a browser
+
+1. Keep CrossDesk running and connected to the server on the host computer.
+2. Open the [Web Client](https://web.crossdesk.cn/), enter the **Remote Device ID** and **Password**, and click **Connect**.
+3. Use the page's display, mouse-mode, and keyboard controls during the session. Phone and tablet browsers can also connect.
+
+For self-hosting, connect both sides to the same service. Browser deployment is documented in [CrossDesk Web Client](https://github.com/kunkundi/crossdesk-web-client).
+
+<a id="session"></a>
+
+## Session controls
+
+Switch devices using session tabs. Expand the control bar if it is collapsed, and hover over icons to see their tooltips.
+
+| Control | Action |
+| --- | --- |
+| Display | Switch the remote monitor |
+| Keyboard | Send shortcuts; Windows `Ctrl+Alt+Del` requires the remote service |
+| Mouse | Enable / release remote mouse control |
+| Speaker | Play / mute remote audio |
+| Folder | Select a file to send and view transfer progress |
+| Video settings | Adjust video quality, capture frame rate, and video preference during the current session |
+| Network statistics | Inspect traffic, packet loss, frame rate, resolution, direct / relay mode, and encryption status |
+| Privacy screen | Enable or disable the host's privacy screen; hover to see its status and available actions |
+| Fullscreen | Enter / exit fullscreen |
+| Disconnect | End the current remote session |
+
+Desktop clients synchronize text clipboard contents. Configure the receiving directory under **Settings → File Save Path**. Closing the main window hides it and keeps the app running; use the system tray or menu-bar exit command to quit completely.
+
+### Adjust video during a session
+
+After connecting, open **Video settings** (the sliders icon) in the toolbar. Choose low / medium / high quality, **30 / 60 fps**, and frame-rate priority / quality priority / balanced adaptation. Changes are sent to the current host without reconnecting; actual results depend on the network, device, and encoder. For older hosts that do not support live video settings, the menu explains the limitation and disables the options.
+
+<p align="center">
+  <img src="docs/images/desktop-stream-video-settings-en.png" width="800" alt="Current session video menu with quality, capture frame rate, and video preference; the background is a public page used for demonstration" />
+</p>
+
+<a id="settings"></a>
+
+## Client settings and updates
+
+Open **☰ → Settings** in the top-right corner and click **OK** to save. Configure codecs and connections before connecting; some settings are disabled during an active session. Scroll down for self-hosting, startup behavior, and the file save path. Adjust quality, frame rate, and video preference from the remote session toolbar.
+
+<p align="center">
+  <img src="docs/images/desktop-settings-en.png" width="720" alt="Current client settings with codec, hardware codecs, TURN, forced relay, and automatic privacy screen options" />
+</p>
+
+| Setting | Purpose |
+| --- | --- |
+| Language | 中文, English, Русский |
+| Capture Method (Windows) | Auto / DXGI / WGC / GDI; choose Auto for automatic headless adaptation |
+| Video Encode Format | H.264 / AV1; hardware codec availability depends on the platform, device, and build options |
+| Enable TURN Service | Allow relay-assisted connections; check this setting if P2P fails |
+| Force Relay | Require relay connections when TURN is enabled; turning TURN off also disables this option |
+| Save remote screen previews | On by default. When disabled, the thumbnail area shows the remote device’s platform and existing previews are cleared; connection records and passwords are preserved |
+| Privacy screen on connect | Automatically enable privacy when this computer is controlled remotely; the controller can toggle it from the session toolbar |
+| Self-Hosted Config | Set the server address and signaling port, then enable the checkbox |
+| Auto Start / Enable Daemon | Configure startup and process supervision; restart as indicated by the UI |
+| File Save Path | Choose where received files are saved |
+
+### Check for updates
+
+The client checks for updates in the background after launch. A new version adds an update indicator to the main window menu. Open **☰ → About** to view the version or click **Check for updates** to check manually. When an update is available, you can view its release notes and open the download page.
+
+<p align="center">
+  <img src="docs/images/desktop-about-en.png" width="720" alt="About dialog with the Check for updates button; version and check result are demonstration data" />
+</p>
+
+<a id="ios"></a>
+
+## Native iOS / iPadOS client
+
+[`apps/ios`](apps/ios/README.md) contains a native controller using the same MiniRTC protocol as the desktop client. It controls remote computers; it does not expose an iPhone or iPad as a remotely controlled desktop.
+
+1. Follow the [iOS guide](apps/ios/README.md) to build and sign the app with Xcode, then install it on an iOS 16+ physical device.
+2. Enter a remote ID on the home screen, connect, and enter its password. Successful connections become available in the recent devices list.
+3. Choose a mouse mode in Settings: **Relative Position** works like a trackpad; **Absolute Position** maps touches directly to the remote screen.
+4. Tap the floating icon to expand the menu, then switch displays, open the keyboard, toggle audio, or send files. Received files are stored in `Documents/Received` and can be exported using the share button beside the transfer status.
+
+The app currently receives remote text into the iOS clipboard. Its UI does not yet expose a button to send the local clipboard.
+
+Gestures include one-finger click, two-finger right-click, long-press drag, and pinch-to-zoom. When zoomed in, two-finger panning moves the viewport. The native and browser clients are maintained separately, so their controls and gestures may differ. The current native UI uses Chinese labels.
+
+<a id="windows-service"></a>
+
+## Windows lock screens and sign-in
+
+**CrossDesk Service** (`CrossDeskService`) reports protected desktop states and forwards `Ctrl+Alt+Del`, keyboard, and mouse input on lock screens, sign-in screens, credential prompts, and secure desktops.
+
+The installer registers an on-demand service. CrossDesk tries to start it on launch, and the service exits when no local CrossDesk client is running. Portable builds offer service installation in the prompt or **Settings → Lock Screen Service**, with administrator privileges. The service depends on a running client.
+
+<details>
+<summary>Manual deployment and service commands</summary>
+
+Keep the complete installation directory. For manual deployment, place `CrossDesk.exe`, `crossdesk_service.exe`, `crossdesk_session_helper.exe`, and all `.dll` files from the same build together. Open an administrator PowerShell in that directory and run the commands you need:
+
+```powershell
+.\CrossDesk.exe --service-install
+.\CrossDesk.exe --service-start
+.\CrossDesk.exe --service-status
+.\CrossDesk.exe --service-ping
+# Stop or uninstall the service
+.\CrossDesk.exe --service-stop
+.\CrossDesk.exe --service-uninstall
+```
+
+</details>
+
+If **Remote Windows service unavailable** appears, check installation and service status on the host. Ordinary desktop connections remain available, while control of protected screens is limited.
+
+<a id="self-hosting"></a>
+
+## Self-hosting
+
+Host your own signaling and TURN services, then enter their connection details under **☰ → Settings → Self-Hosted Config**. Enable the same server configuration on both the controller and host.
+
+- [Self-hosting guide](docs/SELF_HOSTING_EN.md): current Compose deployment, client settings, certificate trust, and troubleshooting.
+- [CrossDesk Server](https://github.com/kunkundi/crossdesk-server): server source and release configuration.
+- [CrossDesk Web Client](https://github.com/kunkundi/crossdesk-web-client): browser source and deployment instructions.
+
+## Development and feedback
+
+- [Build from source](docs/BUILD_EN.md): Windows, macOS, Linux, optional flags, and packaging.
+- [iOS development](apps/ios/README.md): native build and physical-device checks.
+- [Android development](apps/android/README.md): APK builds, installation, and emulator checks.
+- [GUI architecture](docs/gui-architecture.md): desktop UI and platform organization.
+- [FAQ](docs/FAQ.md#english): connection failures, blank video, received files, and build issues.
+- [Report an issue](https://github.com/kunkundi/crossdesk/issues): include both operating systems, client versions, connection mode, and reproduction steps.
+
+## Acknowledgements and license
+
+Thanks to [HelloGitHub](https://hellogithub.com/), [Ruanyf Weekly](https://github.com/ruanyf/weekly), and the [LinuxDo](https://linux.do) community for featuring CrossDesk and contributing feedback.
+
+CrossDesk is licensed under [GPL-3.0](LICENSE). See the [Privacy Policy](PRIVACY.md#english).
+
+### Code signing policy
+
+CrossDesk uses SignPath.io to sign official Windows releases built from this repository.
+
+**Free code signing provided by [SignPath.io](https://signpath.io/), certificate by [SignPath Foundation](https://signpath.org/).**
+
+- **Committers and reviewers:** [kunkundi](https://github.com/kunkundi)
+- **Approvers:** [kunkundi](https://github.com/kunkundi)
+
+## Native Android controller
+
+The independent [Android project](apps/android/README.md) builds an APK for Android 8.0+ arm64 devices. It reuses MiniRTC and the desktop input protocol for remote video/audio, touch and external keyboard/mouse input, display switching, and text clipboard transfer. H.264 and AV1 currently use software decoding. Phone-as-host, file transfer, and full iOS feature parity are not included. See the [Android build guide](apps/android/README.md) for setup and validation.

apps/android/.gitattributes

@@ -0,0 +1,2 @@
+gradlew text eol=lf
+gradlew.bat text eol=crlf

apps/android/.gitignore

@@ -0,0 +1,7 @@
+.gradle/
+.native/
+.idea/
+**/build/
+local.properties
+*.iml
+__pycache__/

apps/android/README.md

@@ -0,0 +1,217 @@
+# CrossDesk Android
+
+原生 Android 控制端，使用 Java 界面、JNI 和 MiniRTC，与桌面端使用相同的信令、ICE、SRTP 和输入协议。没有 WebView。当前版本为 1.6.0，支持 Android 8.0（API 26）及以上的 arm64 手机和平板。
+
+## 当前功能
+
+- 官方或自托管 WSS 信令服务器；授权后进入前台即自动注册或登录本机身份，首页实时显示连接、重连及失败状态。发起桌面连接时复用该身份；切换服务器会重新登录，撤回授权或进入后台会关闭连接。
+- 优先使用 MediaCodec 硬件解码 H.264 / AV1，硬件缓冲区直接提交 Surface；设备无对应硬件、分辨率超限或运行失败时，按原编码格式回退到 OpenH264 / dav1d。软件输出由独立显示线程将 NV12 转 RGBA；只保留最新待显示帧。MiniRTC 原有的通用压缩帧解码队列保持不变。
+- 48 kHz 单声道 PCM 播放，支持静音，音频队列有容量限制。
+- 相对鼠标（触控板）和绝对位置模式；单指点击、绝对模式按住拖动、长按右键，以及外接键盘、鼠标。画面手势与 iOS 一致：双指捏合以触点为中心缩放（1–10 倍），放大后双指拖动画面，原始比例下双指上下滑动控制滚轮。
+- 横竖屏等比例显示、远端多显示器切换。与 iOS 一致的画面质量（低/中/高）、采集帧率（30/60 fps）、画面偏好；支持能力检测、电脑端确认、失败/5 秒超时回退及连续操作的应答排序。
+- 根据常见移动设备解码能力和屏幕尺寸设置起始参数：显示长边不超过 1280 像素时默认低画质（最高 720p）/30 fps，其余默认中画质（最高 1080p）/30 fps。用户保存的画面偏好不变，仍可手动选择高画质或 60 fps。
+- 网络状态按视频、音频、数据、合计展示收发速率和丢包率，并显示实际提交帧率、分辨率、画面延时、平滑 RTT、P2P/TURN 和实际 SRTP 状态。每秒刷新，过期或无效测量显示“—”。
+- 可拖动的悬浮控制球、三列控制菜单和浮动 ASCII / 电脑键盘、常用快捷键；通过剪贴板发送中文等文本，再手动执行远端粘贴。
+- 设备身份与选择保存的连接密码使用 Android Keystore / AES-GCM 加密；首次联网需同意，后台切换会结束会话。
+- 与 iOS 一致的首页卡片、顶部状态/公告/设置入口、密码底部弹层、两列最近连接及分组设置页；最近连接按服务器隔离，长按可删除记录及密码。
+- 页面转场沿用 iOS 的交互方式：设置、隐私、关于及公告页面进入时从右滑入，返回时反向滑出，背景页面轻微跟随；进入和退出远程会话使用 0.2 秒淡入淡出。遵循 Android 系统动画开关及速度设置。
+- 设置页的鼠标控制、画面偏好，以及悬浮控制栏的画质、帧率和画面偏好使用 0.2 秒的选中底块滑动动画；连续点击从当前位置转向，电脑端拒绝或超时后平滑回退，系统关闭动画时直接切换。
+- 通知公告与 iOS 共用信令协议，支持未读角标、分页、下拉刷新、更新推送、详情和网页链接；已读及删除状态按服务器、本机身份和公告版本保存在本机。
+- 连接建立并收到对端信息后，按 iOS 相同的版本号及补丁规则检查桌面端版本；旧版本弹出“升级提示”，点击“知道了”继续控制。每次连接最多检查、提醒一次；缺失或无效版本按旧版提醒，检查失败不打断连接。仅获取公共 HTTPS 版本元数据，不上传对端身份或版本；未授权不请求，断开及进入后台取消检查并忽略过期回复。
+- 可选保存远程画面预览：默认关闭，经确认开启后，从下一次连接起保存一张 640×360 预览，用于最近连接卡片。支持清除预览，关闭选项或撤回授权会清除已有图片。
+- “关于 CrossDesk”对齐 iOS 的版本、软件许可、开源组件及源码与构建说明页面，包含 OpenFEC 告知、组件详情和可离线选择复制的完整许可；版本号读取当前 APK，构建时记录应用与 MiniRTC 的基础版本。
+
+当前不包含安卓被控端、文件传输、隐私屏、Ctrl+Alt+Del 服务命令或 iOS 全部附加功能。相关入口保留 iOS 的布局并明确标注不可用。硬件能力取决于设备和编码格式，软件回退时高分辨率或高帧率可能增加功耗；可通过悬浮菜单的画面设置降低画质或采集帧率。暂只构建 `arm64-v8a`，不支持 x86 模拟器或 32 位设备。
+
+## 构建
+
+在 macOS 或 Linux 安装：
+
+- JDK 17 或更新版本（可使用 Android Studio 自带 JBR）。
+- Android SDK Platform 36、Build Tools 36.0.0、NDK `28.2.13676358`。
+- Xmake **3.1.1**、Python 3.9+、Git、CMake 和主机编译工具。
+- Python 的 setuptools、wheel，用于构建依赖的宿主工具。
+
+先在仓库根目录初始化子模块：
+
+```sh
+git submodule update --init --recursive
+```
+
+macOS 命令行示例：
+
+```sh
+export ANDROID_HOME="$HOME/Library/Android/sdk"
+export JAVA_HOME="/Applications/Android Studio.app/Contents/jbr/Contents/Home"
+# 若 PATH 中的 Xmake 不是 3.1.1，通过 XMAKE_BIN 指定对应可执行文件。
+# 构建器也识别 ~/.cache/crossdesk/toolchains/xmake-3.1.1/xmake。
+cd apps/android
+./gradlew :app:assembleDebug
+```
+
+也可用 Android Studio 打开 `apps/android`。在 SDK Manager 安装上述版本；SDK 位置可由 IDE 写入被忽略的 `local.properties`。Xmake 不在 IDE 的 PATH 中时，启动 IDE 前设置 `XMAKE_BIN`。
+
+输出为 `app/build/outputs/apk/debug/app-debug.apk`，已由本机 Android 调试密钥签名：
+
+```sh
+"$ANDROID_HOME/platform-tools/adb" install -r app/build/outputs/apk/debug/app-debug.apk
+```
+
+Release 构建使用 `./gradlew :app:assembleRelease`，默认输出未签名 APK；发行前需配置自己的签名。Debug APK 也使用优化后的 Release 原生库，以保证软件解码性能。
+
+首次构建会下载并从源码编译依赖，耗时取决于网络。后续编译复用缓存。Android 直接编译 `deps/submodules/minirtc` 中的源码；构建产物和依赖缓存位于 `.native/`，Xmake 工程配置位于 `native/.xmake/`，与桌面和 iOS 分开保存：
+
+- Gradle 9.3.1、AGP 9.1.0、NDK r28c 固定在工程中。
+- Xmake 包仓库固定到 `eda39de3fb99b420c168f1ab9ab2d1791e11b662`。
+- `scripts/build_native.py` 调用独立的 `native/xmake.lua`，直接包含 MiniRTC 子模块的构建定义。构建过程不复制 MiniRTC 源码，也不应用补丁。
+- MiniRTC 源码内的 Android 分支启用 OpenH264、SVT-AV1 和 dav1d 软件编解码及依赖配方，兼容 OpenFEC 的 Android 头文件，并关闭 UPnP。SVT-AV1 使用内置 ARM CPU 能力检测；当前应用作为控制端只接收视频，库同时提供 AV1 编码能力。TLS 校验位于 MiniRTC 内部。STUN、TURN UDP/TCP 与直接连接仍由 MiniRTC 提供。
+- MiniRTC 的 `thirdparty/openssl/xmake.lua` 统一维护 iOS 和 Android 配方；Android 显式使用 NDK 的归档索引工具，避免 macOS `ranlib` 损坏 ELF 静态库。
+- SVT-AV1 编码及 dav1d 解码已在 Android 15 arm64 / 16 KB 模拟器上完成验证，覆盖软件编码、请求硬件加速时的软件回退、码率更新、强制关键帧及 320×192 → 256×144 → 320×192 分辨率切换；两组测试各成功编码并解码 24 帧。这是编解码正确性验证，不代表真机实时编码性能。
+- 依赖静态链接到 `libcrossdesk_android.so`，保留 16 KB ELF / APK 对齐。
+
+修改原生代码后重新运行 Gradle 即可；修改依赖版本或配方时同步检查许可证内容，必要时移除 `.native/packages` 重新构建。MiniRTC 的源码和依赖配方变更直接保存在子模块中；提交时先提交 MiniRTC，再更新主仓库的子模块引用。
+
+## GitHub Actions
+
+[`Build Android`](../../.github/workflows/build-android.yml) 可在 Actions 页面单独手动运行；修改 Android、MiniRTC、共享协议或许可证资料的 Pull Request 也会触发。仓库原有的 [`Build and Release`](../../.github/workflows/build.yml) 在分支推送、标签推送及手动运行时调用同一工作流，`v` 标签发布会等待安卓构建及签名成功，并将已签名 Release APK 加入 GitHub Release 和现有下载服务器的产物集合。推送主仓库前，先确保它引用的 MiniRTC 提交已推送到子模块远程仓库，否则 CI 无法完成检出。
+
+单独发布使用 [`Release Mobile`](../../.github/workflows/release-mobile.yml)。先提交 `app/build.gradle` 中需要发布的 `versionName`，再为该提交创建 `android-v<versionName>-YYYYMMDD` 标签，例如：
+
+```sh
+git tag android-v1.6.0-20261002
+git push origin android-v1.6.0-20261002
+```
+
+该标签只触发安卓构建，使用固定发布密钥签名并验证 Release APK 后，再发布到独立的 GitHub Release 和现有下载服务器。签名失败或缺少签名 Secrets 时停止发布，不回退到未签名 APK。标签版本必须与应用版本一致，日期必须有效。重试发布时，在 Actions 页面手动运行 `Release Mobile`，将已有标签填入 `source_tag`；即使从其他分支触发，也会检出该标签的源码。APK 的源码资料记录安卓标签及准确的应用、MiniRTC 提交。
+
+移动端独立发布保留桌面 `latest` 标签和 GitHub 的最新 Release 选择。APK 上传完成后，将服务器下载地址合并到共享 `https://version.crossdesk.cn/version.json` 的 `downloads.android-arm64`，并在该下载项中记录安卓版本和发布日期；保留顶层桌面版本信息和其他平台的下载项。下载服务器上传保留其他平台文件，复用仓库已有的 `SERVER_HOST`、`SERVER_USER`、`SERVER_KEY` Secrets。普通桌面版本标签仍通过 `Build and Release` 发布全部平台并更新各平台下载项；所有发布任务更新版本文件时使用同一队列。单独运行 `Build Android` 仍只上传 Actions 构建产物。
+
+已有 Release 需要补传服务器或刷新下载信息时，可手动运行 `Update version.json from Release` 并填写已有 `source_tag`，无需重新构建。
+
+工作流使用 Ubuntu 24.04、JDK 17、Python 3.13、SDK 36、Build Tools 36.0.0、NDK r28c 和 Xmake 3.1.1。Gradle 使用工程内的 Wrapper，原生构建器固定 Xmake 包仓库版本。SDK/NDK 使用独立目录缓存，按宿主系统、架构和工具链版本区分；命中缓存时跳过 SDK 安装，未命中时在安装完成后立即保存，即使后续 APK 构建失败，下次也可复用。Xmake 可执行环境、固定版本的包仓库和 pip 下载也有各自的缓存；Ubuntu 系统工具只安装缺失项。
+
+Gradle 缓存与 Android 原生依赖缓存分别管理；原生缓存按宿主架构、构建脚本及 MiniRTC 配方区分，不复用桌面或 iOS 的配置和目标文件。GitHub 托管 runner 每次启动仍是新环境；第一次运行或缓存失效时需要安装。不同分支和标签可读取默认分支的缓存，因此建议先在默认分支运行一次 `Build Android` 预热，再创建发布标签。
+
+CI 构建 Debug、Release 和设备测试 APK，执行 Debug / Release Lint、本机 C++ 协议与画面队列测试，并校验 APK 的 arm64 ABI、16 KB ELF / ZIP 对齐、完整许可证及 Debug 签名。Ubuntu x64 构建机上不运行 arm64 设备测试；使用下面的设备验证流程在 arm64 手机或模拟器上执行。Lint 报告在构建失败时也会保留。
+
+产物使用 Android 工程自己的 `versionName`，例如 `v1.6.0-20261002`，不跟随桌面版本号。构建日期采用上海时区；带日期的版本标签沿用标签中的日期，与 iOS 一致。Actions 提供：
+
+- `crossdesk-android-arm64-<版本>.apk`：已签名 Release APK，独立安卓发布和全平台标签发布收集此 APK，可直接安装。
+- `crossdesk-android-arm64-unsigned-<版本>.apk`：构建工作流的中间产物，也可用于自行签名和验证修改后的构建。
+- `crossdesk-android-arm64-debug-<版本>.apk` 和对应的 `-test.apk`：可安装的调试应用和设备测试包，保留 14 天。
+- `crossdesk-android-reports`：Lint 报告，保留 14 天。
+
+Debug APK 使用每次运行的临时调试证书，可能无法覆盖手机上已有的其他签名版本；卸载原应用会清除本机连接记录和密码。需要持续覆盖升级时，应使用同一私钥签名 Release APK，并在发布新版本时递增 `app/build.gradle` 中的 `versionCode`。未签名 APK 已完成对齐，可通过 SDK 的 `apksigner sign --ks <自己的密钥库> --out <已签名.apk> <未签名.apk>` 签名，再用 `apksigner verify` 检查。
+
+### Release 签名
+
+[`Sign Android Release`](../../.github/workflows/sign-android.yml) 在独立 job 中签名，不检出或执行应用源码。构建 job 和 Pull Request 构建不接收发布密钥。签名 job 使用 Build Tools 36.0.0，先执行 `zipalign -P 16`，再通过环境变量向 `apksigner` 提供密码，验证签名和 16 KB 对齐后上传已签名 APK。临时密钥库在步骤结束时清理，产物中不包含密钥或密码。
+
+首次发布前，在仓库 Settings → Secrets and variables → Actions 配置：
+
+| Secret | 内容 |
+| --- | --- |
+| `ANDROID_KEYSTORE_BASE64` | 发布密钥库文件的 Base64 内容 |
+| `ANDROID_KEYSTORE_PASSWORD` | 密钥库密码 |
+| `ANDROID_KEY_ALIAS` | 发布私钥的 alias |
+| `ANDROID_KEY_PASSWORD` | 发布私钥密码 |
+
+APK 签名不需要 Google Play 开发者账号。若没有已有发布密钥，可使用 JDK 的 `keytool` 创建一次，密钥库保存在工程之外，并备份密钥和密码：
+
+```sh
+keytool -genkeypair -storetype PKCS12 -keystore /path/outside/repo/crossdesk-release.p12 \
+  -alias crossdesk-release -keyalg RSA -keysize 4096 -validity 10000
+```
+
+PKCS12 使用同一个密钥库和私钥密码，将它配置到两个密码 Secrets。可用 `gh secret set` 从标准输入写入 Secrets，避免把密码放进命令行参数。macOS 上传密钥库示例：
+
+```sh
+base64 -i /path/outside/repo/crossdesk-release.p12 | gh secret set ANDROID_KEYSTORE_BASE64 --repo kunkundi/crossdesk
+gh secret set ANDROID_KEYSTORE_PASSWORD --repo kunkundi/crossdesk
+gh secret set ANDROID_KEY_ALIAS --repo kunkundi/crossdesk
+gh secret set ANDROID_KEY_PASSWORD --repo kunkundi/crossdesk
+```
+
+后续版本沿用这些 Secrets，不能在每次构建时生成新密钥，也不能将密钥或密码提交到 Git。已有未签名安卓 Release 可单独运行 `Sign Android Release` 并填写其 `source_tag`，无需重新构建；该手动任务只上传已签名 Actions 产物，不修改已发布 Release。普通发布流程会自动签名、上传下载服务器，并将 `downloads.android-arm64` 指向已签名 APK。旧 Release 同时保留已签名和未签名 APK 时，版本文件优先选择相同版本的已签名文件。
+
+## 使用与连接安全
+
+授权后首页会自动连接服务器，绿色“已连接服务器”表示信令登录完成；失败时可点击状态重试。设置页显示本机 ID。电脑端保持在线，在 Android 首页填写 9 位设备 ID，首次点击“连接”后在底部弹层输入密码，可选择加密保存密码。成功保存后，点击最近连接或再次输入相同 ID 会直接使用该服务器下保存的密码，重启应用后仍然有效；密码无法读取或被远端拒绝时会重新显示输入弹层，新密码仅在连接成功后替换，取消或连接失败不会覆盖原密码。自托管服务器从“设置 → 服务器”展开修改主机名与端口，不能填写 `https://`、路径或完整 URL。默认是 `api.crossdesk.cn:9099`。
+
+最近连接卡片与 iOS 一样，在设备 ID 旁显示已保存密码的钥匙图标和在线／离线状态，在线设备优先，同一状态内保留原来的最近连接顺序。授权并登录服务器后，通过身份信令订阅 `recent_connections_presence`，接收完整快照与 `presence_update`；每 30 秒刷新，状态超过 60 秒未更新则显示离线。断线、切换服务器或进入后台会清除在线状态，重连后等待新的快照。自托管服务需要支持相同的设备在线状态协议。
+
+证书信任来自 Android 默认 TrustManager 导出的根证书。JNI 设置证书文件路径后，MiniRTC 的 Android 分支通过 `SSL_CTX_load_verify_locations` 显式加载，并校验证书链及 DNS / IP 主机名；不会跳过 TLS 验证。Android 应用进程带有 `AT_SECURE` 标记，不能依赖 OpenSSL 的默认路径加载器读取 `SSL_CERT_FILE`，否则会出现所有服务器均无法建立信任链的问题。自托管服务器应使用受系统信任的证书。当前没有在应用内导入自签名证书的入口。
+
+身份按主机名和端口分开保存，备份与设备迁移不包含应用数据。密码不写入连接记录，仅在明确开启“保存密码”后写入独立加密存储；未开启时仅用于当前会话。连接成功通知只处理一次，重复的传输就绪回调不会再次保存密码或重建会话页面；密码存储拒绝空值覆盖。旧版本已被空值覆盖的密码无法恢复，遇到此记录时会提示重新输入一次，并保留“保存密码”开启状态。由于 MiniRTC 的诊断日志包含登录身份，Android 桥接层关闭其会话日志。身份存储损坏会显示错误，不会静默重新注册。
+
+会话中的“剪贴板”发送用户输入的文本；收到的远端文本先留在会话内，点击“复制远端文本”才写入手机剪贴板。退出会话后清除会话内容。每次发送最多 128 KB。浮动键盘切换“电脑”后的“复制 / 粘贴 / 全选”根据远端平台选择 Ctrl 或 macOS Command。
+
+首页设置里的“画面偏好”保存在本机，作为下一次连接的默认偏好；会话内画面设置与 iOS 一样只影响当前连接。初始质量按屏幕长边选择低（不超过 1280 像素）或中，采集帧率为 30 fps，电脑端报告支持后自动下发；旧版电脑未报告支持时禁用控件。网络页的 FPS 统计实际提交给 Android Surface 的帧，画面延时使用 MiniRTC 校准后的采集时间至提交时刻的估计值，未完成校准时显示“—”；RTT 使用 0.25 权重平滑，3 秒未更新的数据会过期。切换屏幕清除旧画面的帧率、分辨率和画面延时，保留网络统计。
+
+采集时间的有效性在接收时检查，本机解码和显示等待计入画面延时；真实延时超过 5 秒也会继续显示，不会当成无效时间戳过滤。显示线程复用解码器的 CPU NV12 缓冲区，只保留一帧待显示画面，切换显示器或 Surface 时清除旧帧，会话结束时先停止显示线程再销毁原生连接。
+
+## 隐私授权
+
+未完成隐私授权时，首次打开或从后台返回应用会自动显示离线隐私政策；需要主动勾选阅读并同意后才能联网，与 iOS 一致。暂不同意后，本次停留不会反复弹窗，仍可浏览设置和本地连接记录。设置 → 隐私 → 隐私与授权可离线查看政策或撤回授权；撤回后下次进入应用会再次提示。
+
+## 远程画面预览
+
+设置 → 隐私中的“保存远程画面预览”默认关闭，完成联网授权后可开启。与 iOS 一致，开启前说明预览可能包含个人或工作信息；每次连接只在实际显示画面后保存一张预览，居中裁剪为 640×360、JPEG 质量 78。截图来自远程视频的 Surface，不包含悬浮菜单、键盘、本地光标或画面外的黑边；压缩、读写和解码在串行后台线程执行，不复制完整 4K 位图，也不连续截图。
+
+图片保存在应用私有、不参与备份的 `RecentConnectionThumbnails` 目录，不上传、不写入系统相册。文件按服务器与远端 ID 隔离，最近连接卡片异步加载；未开启、没有预览或图片损坏时继续显示平台封面。删除或淘汰连接记录会删除对应预览。
+
+“清除预览图”保留连接记录、密码和开关状态，下一次连接仍可保存新的预览。关闭保存选项或撤回联网授权会关闭保存并清除全部预览。清除时立即使未完成的截图和读取请求失效，删除与保存共用串行队列，防止已清除的图片被旧截图重新写回；清除失败会显示提示，可再次重试。
+
+## 通知公告
+
+首页铃铛展示全部未读公告的数量（超过 99 条显示 99+）。授权并连接服务器后，通过已有身份信令请求 `announcements_list`，摘要每页 200 条、正文每页 20 条；不依赖远程桌面连接。列表支持刷新、滚动加载更多、长按或左滑删除，删除前需确认，且仅隐藏本机的当前版本。打开详情即标记已读；服务器更新公告版本后会重新显示并计为未读。详情正文保留纯文本和换行，支持 HTTP(S) 地址及 `[文字](https://...)` 链接，不执行 HTML 或其他协议。
+
+阅读和删除标记以原子文件保存在不参与备份的 `AnnouncementReads` 目录，按主机名、端口和本机设备 ID 隔离；写入失败会提示并保留原状态。内容只缓存于内存。收到 `announcements_changed` 时刷新，分页期间目录版本改变时重新获取；过期请求、断线前的回复不会覆盖新状态。请求失败或 12 秒超时可重试；未授权不联网，进入后台停止请求。自托管服务需要支持与桌面及 iOS 相同的公告协议。
+
+## 验证
+
+连接 arm64 设备或启动 arm64 模拟器后，在 `apps/android` 执行：
+
+```sh
+./gradlew :app:assembleDebug :app:assembleDebugAndroidTest :app:lintDebug
+"$ANDROID_HOME/platform-tools/adb" install -r app/build/outputs/apk/debug/app-debug.apk
+"$ANDROID_HOME/platform-tools/adb" install -r app/build/outputs/apk/androidTest/debug/app-debug-androidTest.apk
+"$ANDROID_HOME/platform-tools/adb" shell am instrument -w -r cn.crossdesk.mobile.test/androidx.test.runner.AndroidJUnitRunner
+"$ANDROID_HOME/platform-tools/adb" uninstall cn.crossdesk.mobile.test
+python3 test/verify_apk.py app/build/outputs/apk/debug/app-debug.apk
+python3 test/run_native.py
+```
+
+以上流程覆盖安装应用并只卸载测试包，保留已有应用数据；多台设备同时连接时，在每个 `adb` 命令中加上 `-s <设备序列号>`。`connectedDebugAndroidTest` 可能卸载被测应用及其数据，不用于已有连接记录或密码的设备。
+
+测试源码、资源和检查入口统一位于 `test/`：
+
+- `test/native/`：本机 C++ 协议、帧队列与画面延时回归，由 `test/run_native.py` 编译运行。
+- `test/android/java/`：非 UI 的 Android 功能回归，覆盖需要 Android API 或 JNI 的逻辑，包括设备在线状态刷新、过期与信令重连。Gradle 的 `androidTest` 源集显式引用此目录。
+- `test/android/assets/tls/`：本机环回 TLS 测试证书，仅进入测试 APK。
+- `test/verify_apk.py`：发布 APK 的 arm64 ABI、16 KB ELF / ZIP 对齐、许可证完整性和源码资料检查。
+
+设备回归仅保留 TLS 证书校验、凭据加密及服务器隔离、原生连接生命周期、键盘映射、画面设置状态、缩放及输入坐标计算、网络采样、公告与预览数据持久化、版本兼容判断。预览存储测试使用生成的纯色位图，不采集屏幕或视频画面。
+
+画面手势需在远程会话中人工验证：两种鼠标模式均检查捏合放大至 10 倍、缩回 1 倍、放大后的双指平移和边界限制；原始比例下双指滑动仍控制滚轮，捏合及平移不应产生远端点击或拖动。放大后检查点击与光标位置一致、横竖屏切换后位置正确，切换显示器或重新连接恢复 1 倍。自动化回归只验证几何计算，不注入 UI 手势。
+
+UI 验证统一由人工完成，不维护页面导航、布局、动画、悬浮窗和截图采集的自动化用例。许可证和构建资料的完整性由 `test/verify_apk.py` 检查。
+
+## MediaCodec 编解码
+
+实现参照 MiniRTC 的 NVCodec 分层：`src/media/mediacodec/` 负责硬件后端、能力查询和 JNI/Surface 资源；`src/media/video/encode/mediacodec/` 与 `src/media/video/decode/mediacodec/` 分别接入编码器、解码器接口，并负责同编码格式的软件回退。Android 工程直接编译这些源码。通用 API 仅需启用 `hardware_acceleration` 和 `native_video_output`。JavaVM 由 Android JNI 适配层在 `JNI_OnLoad` 中设置到后端私有实现；该桥接不安装为 SDK 头文件，也不导出为动态库符号。当前能力查询和 SurfaceTexture 创建依赖 JNI，缺少 JavaVM 时仍可使用软件编解码。独立输出线程在画面停止更新后仍会取出最后一帧，空闲时休眠。
+
+- H.264 / AV1 由系统能力查询选择硬件组件，支持编码码率调整、请求关键帧和分辨率变化。编码输入为 8 位 NV12，硬件需支持 NV12 / I420 ByteBuffer 输入；不满足时回退 OpenH264 / SVT-AV1。当前应用仍是控制端，库的编码能力不代表已实现安卓被控端。
+- 解码原生输出为可保留/释放的 MediaCodec 缓冲区，显示线程直接提交 Surface。切换显示器、销毁 Surface 和切回软件输出时解除旧 Surface 绑定。缓冲区在解码器重建或销毁后不可再次显示；未显示的缓冲区自动归还。
+- 关闭原生输出时，支持将硬件 NV12 / I420 输出按行距、填充高度和裁剪范围转换为紧凑 NV12；未知布局回退软件。
+- Retroid Pocket 2S 的 `OMX.sprd.av1.decoder` 实际加载软件 dav1d，虽被系统标成硬件组件，仍明确排除；AV1 使用软件回退。H.264 可使用 `OMX.sprd.h264.encoder` / `OMX.sprd.h264.decoder`。
+
+AV1 硬件路径尚无对应实机验证；Retroid 上使用 dav1d 软件解码。
+
+## 开源资料
+
+应用为 GPL-3.0-only，MiniRTC 为 LGPL-3.0-only，其余组件保留各自许可证。`scripts/generate_notices.py` 复用仓库已有的依赖通知，选取 Android 实际使用的组件；`licenses/additional-notices.json` 补充 OpenH264、GNU libiconv 和 NDK / LLVM 运行时通知。APK 的开源信息页提供完整内容。可以修改库源码、重新链接，并使用自己的 Android 密钥签名安装。
+
+设置 → 关于使用与 iOS 相同的分组及入口：版本、软件许可、开源组件、源码与构建说明。软件许可中可分别阅读 GNU GPL 第 3 版及开源软件权利说明；开源组件页单独展示 OpenFEC 告知，其余组件列出名称和许可证，详情包含版本、源码、适用的构建配方和每一份许可文档。内容按 Android 构建生成，不显示未使用的 iOS 依赖，Android 签名说明替换 Apple 签名说明。
+
+APK 保留完整 `THIRD_PARTY_NOTICES.txt`，并生成轻量的 `ThirdPartyLicenses.json` 索引、72 份独立许可文档及 `SourceMetadata.json`。打开文档时才读取正文，长文按有限长度分块显示，支持文本选择、复制与网页链接；打包验证核对每份正文的 SHA-256。源码页面显示标签或提交版本及未发布修改提示，源码链接指向基础提交。当前 Android 构建说明、构建脚本、MiniRTC、OpenSSL 及 SVT-AV1 配方随 APK 离线提供，避免开发版链接指向基础提交中尚不存在的 Android 文件。

apps/android/app/build.gradle

@@ -0,0 +1,43 @@
+plugins { id 'com.android.application' }
+
+android {
+    namespace 'cn.crossdesk.mobile'
+    compileSdk 36
+    ndkVersion '28.2.13676358'
+    defaultConfig {
+        applicationId 'cn.crossdesk.mobile'
+        minSdk 26
+        targetSdk 36
+        versionCode 2
+        versionName '1.6.0'
+        ndk { abiFilters 'arm64-v8a' }
+        testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
+    }
+    sourceSets.main.jniLibs.srcDirs = [layout.buildDirectory.dir('native')]
+    sourceSets.main.assets.srcDirs += [layout.buildDirectory.dir('generated/notices')]
+    sourceSets.androidTest.java.srcDirs = ['../test/android/java']
+    sourceSets.androidTest.assets.srcDirs = ['../test/android/assets']
+    buildTypes.release { minifyEnabled false }
+    packaging.jniLibs.useLegacyPackaging = false
+}
+
+dependencies {
+    androidTestImplementation 'androidx.test:runner:1.7.0'
+    androidTestImplementation 'androidx.test.ext:junit:1.3.0'
+}
+
+tasks.register('buildMiniRtc', Exec) {
+    workingDir rootProject.projectDir
+    commandLine 'python3', 'scripts/build_native.py'
+    environment 'ANDROID_HOME', androidComponents.sdkComponents.sdkDirectory.get().asFile.absolutePath
+}
+tasks.named('preBuild').configure { dependsOn 'buildMiniRtc' }
+tasks.register('generateNotices', Exec) {
+    workingDir rootProject.projectDir
+    commandLine 'python3', 'scripts/generate_notices.py'
+}
+tasks.named('preBuild').configure { dependsOn 'generateNotices' }

apps/android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <application android:theme="@style/AppTheme" android:label="CrossDesk"
+        android:icon="@mipmap/ic_launcher" android:allowBackup="false"
+        android:fullBackupContent="false"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:supportsRtl="true" android:usesCleartextTraffic="false">
+        <activity android:name=".MainActivity" android:exported="true"
+            android:configChanges="orientation|screenSize|keyboardHidden"
+            android:windowSoftInputMode="adjustResize">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>

apps/android/app/src/main/java/cn/crossdesk/mobile/AboutPages.java

@@ -0,0 +1,116 @@
+package cn.crossdesk.mobile;
+
+import android.content.ActivityNotFoundException;
+import android.content.Intent;
+import android.net.Uri;
+import android.view.Gravity;
+import android.view.View;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+import android.widget.Toast;
+import java.util.List;
+import static cn.crossdesk.mobile.MobileUi.*;
+
+/** Mirrors the iOS About / component / source / document navigation. */
+final class AboutPages {
+    private final MainActivity activity;
+    private final MobileUi ui;
+    private final Runnable settings;
+    private final LicenseCatalog catalog;
+
+    AboutPages(MainActivity activity,MobileUi ui,Runnable settings){
+        this.activity=activity;this.ui=ui;this.settings=settings;
+        LicenseCatalog loaded;try{loaded=new LicenseCatalog(activity);}catch(Exception error){loaded=null;}catalog=loaded;
+    }
+    void show(){
+        LinearLayout content=activity.formPage("about","关于 CrossDesk",settings);
+        if(catalog==null){unavailable(content);return;}
+        LinearLayout version=activity.section(content,"");value(version,"版本",applicationVersion());ui.gap(content,28);
+        LinearLayout links=activity.section(content,"");
+        activity.link(links,"软件许可","",()->component(catalog.find("crossdesk"),this::show));ui.divider(links);
+        activity.link(links,"开源组件","",this::components);ui.divider(links);
+        activity.link(links,"源码与构建说明","",this::source);
+        activity.footer(content,"许可与版权声明可离线查阅。");
+    }
+    private String applicationVersion(){
+        try{return activity.getPackageManager().getPackageInfo(activity.getPackageName(),0).versionName;}catch(android.content.pm.PackageManager.NameNotFoundException error){return "—";}
+    }
+    private void components(){
+        LinearLayout content=activity.formPage("open-source","开源组件",this::show);
+        LinearLayout notice=activity.section(content,"OpenFEC 告知");
+        paragraph(notice,"本应用使用 OpenFEC 提供前向纠错功能，遵循 CeCILL-C 1.0 许可。该许可规定了有限保证及责任限制，详情见许可全文。",SECONDARY);
+        ui.divider(notice);paragraph(notice,"(c) Copyright 2009 - 2012 INRIA - All rights reserved",INK);ui.divider(notice);
+        activity.link(notice,"OpenFEC 许可与源码","",()->component(catalog.find("openfec"),this::components));ui.gap(content,28);
+        LinearLayout list=activity.section(content,"");boolean first=true;
+        for(LicenseCatalog.Component item:catalog.components){
+            if(item.id.equals("crossdesk")||item.id.equals("openfec"))continue;
+            if(!first)ui.divider(list);first=false;
+            LinearLayout row=ui.row();row.setPadding(ui.dp(16),ui.dp(12),ui.dp(12),ui.dp(12));
+            LinearLayout labels=ui.column();labels.addView(ui.text(item.name,16,false));ui.gap(labels,4);
+            TextView license=ui.text(item.license,12,false);license.setTextColor(SECONDARY);labels.addView(license);
+            row.addView(labels,new LinearLayout.LayoutParams(0,-2,1));TextView chevron=ui.text(" ›",23,false);chevron.setTextColor(0xFFB7B7BD);row.addView(chevron);
+            row.setContentDescription(item.name+"，"+item.license);row.setClickable(true);row.setFocusable(true);row.setOnClickListener(v->component(item,this::components));list.addView(row);
+        }
+        activity.footer(content,"各组件遵循所列开源许可证，其授予的权利不受本应用普通使用条款限制。查看源码需要网络连接。");
+    }
+    private void component(LicenseCatalog.Component item,Runnable back){
+        LinearLayout content=activity.formPage("license:"+item.id,item.name,back);LinearLayout info=activity.section(content,"");
+        String version=item.id.equals("crossdesk")?applicationVersion():item.version.length()==40?item.version.substring(0,12):item.version;
+        value(info,"版本",version);ui.divider(info);value(info,"许可",item.license);ui.divider(info);
+        external(info,"查看源码",item.sourceURL);
+        if(!item.buildDocuments.isEmpty()||!item.buildSourceURL.isEmpty()){
+            ui.divider(info);
+            if(!item.buildDocuments.isEmpty())activity.link(info,"构建配方与项目补丁","",()->buildSources(item,back));
+            else external(info,"构建配方与项目补丁",item.buildSourceURL);
+        }
+        ui.gap(content,16);LinearLayout docs=activity.section(content,"许可与版权声明");
+        for(int i=0;i<item.documents.size();i++){
+            if(i>0)ui.divider(docs);LicenseCatalog.Document document=item.documents.get(i);
+            activity.link(docs,item.documentTitle(document),"",()->document(item.documentTitle(document),document,()->component(item,back)));
+        }
+    }
+    private void source(){
+        LinearLayout content=activity.formPage("source","源码与构建说明",this::show);
+        LinearLayout info=activity.section(content,"本版本源码与构建说明");
+        if(catalog.source==null){paragraph(info,"本版本源码信息暂不可用。",SECONDARY);ui.divider(info);external(info,"项目主页","https://github.com/kunkundi/crossdesk");return;}
+        String revision=catalog.source.optString("revision","");String tag=catalog.source.isNull("tag")?"":catalog.source.optString("tag","");
+        value(info,"源码版本",tag.isEmpty()?revision.substring(0,Math.min(12,revision.length())):tag);ui.divider(info);
+        if(catalog.source.optBoolean("isModified")){paragraph(info,"开发版本包含尚未发布的修改，以下链接为基础版本源码。",SECONDARY);ui.divider(info);}
+        external(info,"查看源码",catalog.source.optString("sourceURL",catalog.find("crossdesk").sourceURL));ui.divider(info);
+        try{
+            List<LicenseCatalog.Document> documents=LicenseCatalog.documents(catalog.source.optJSONArray("buildDocuments"));
+            if(!documents.isEmpty())actionLink(info,"构建说明",()->document("构建说明",documents.get(0),this::source));
+            else external(info,"构建说明",catalog.source.optString("buildInstructionsURL","https://github.com/kunkundi/crossdesk"));
+        }catch(org.json.JSONException error){paragraph(info,"本版本源码信息暂不可用。",SECONDARY);}
+    }
+    private void buildSources(LicenseCatalog.Component item,Runnable back){
+        LinearLayout content=activity.formPage("build:"+item.id,"构建配方与项目补丁",()->component(item,back));
+        if(!item.buildSourceURL.isEmpty()){LinearLayout upstream=activity.section(content,"");external(upstream,"查看源码",item.buildSourceURL);ui.gap(content,28);}
+        LinearLayout docs=activity.section(content,"");
+        for(int i=0;i<item.buildDocuments.size();i++){
+            if(i>0)ui.divider(docs);LicenseCatalog.Document document=item.buildDocuments.get(i);
+            activity.link(docs,document.title,"",()->document(document.title,document,()->buildSources(item,back)));
+        }
+    }
+    private void document(String title,LicenseCatalog.Document document,Runnable back){
+        try{activity.licenseDocument(title,LicenseCatalog.read(activity,document.asset),back);}catch(java.io.IOException error){unavailable(activity.formPage("license-error",title,back));}
+    }
+    private void value(LinearLayout parent,String label,String value){
+        LinearLayout row=ui.row();row.setPadding(ui.dp(16),ui.dp(14),ui.dp(16),ui.dp(14));
+        TextView key=ui.text(label,16,false);key.setPadding(0,0,ui.dp(16),0);row.addView(key);
+        TextView content=ui.text(value,16,false);content.setTextColor(SECONDARY);content.setGravity(Gravity.END);content.setTextIsSelectable(true);row.addView(content,new LinearLayout.LayoutParams(0,-2,1));parent.addView(row);
+    }
+    private void paragraph(LinearLayout parent,String text,int color){TextView view=ui.text(text,13,false);view.setTextColor(color);view.setPadding(ui.dp(16),ui.dp(12),ui.dp(16),ui.dp(12));view.setLineSpacing(ui.dp(3),1);parent.addView(view);}
+    private void external(LinearLayout parent,String title,String url){
+        actionLink(parent,title,()->open(url));
+    }
+    private void actionLink(LinearLayout parent,String title,Runnable action){TextView link=ui.action(title,BLUE,action);link.setTypeface(android.graphics.Typeface.DEFAULT);link.setGravity(Gravity.START|Gravity.CENTER_VERTICAL);link.setPadding(ui.dp(16),ui.dp(12),ui.dp(16),ui.dp(12));parent.addView(link);}
+    private void open(String url){
+        Uri uri=Uri.parse(url);if(!"https".equals(uri.getScheme())&&!"http".equals(uri.getScheme()))return;
+        try{activity.startActivity(new Intent(Intent.ACTION_VIEW,uri).addCategory(Intent.CATEGORY_BROWSABLE));}catch(ActivityNotFoundException error){Toast.makeText(activity,"未找到可打开链接的浏览器",Toast.LENGTH_SHORT).show();}
+    }
+    private void unavailable(LinearLayout content){
+        content.setGravity(Gravity.CENTER);ui.gap(content,32);TextView icon=ui.text("▤",36,false);icon.setTextColor(SECONDARY);content.addView(icon);ui.gap(content,12);
+        content.addView(ui.text("无法读取开源许可",17,true));TextView message=ui.text("应用中的许可文件缺失或损坏，请重新安装应用。",14,false);message.setGravity(Gravity.CENTER);message.setTextColor(SECONDARY);content.addView(message);
+    }
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/AnnouncementInbox.java

@@ -0,0 +1,235 @@
+package cn.crossdesk.mobile;
+
+import android.os.Handler;
+import android.os.Looper;
+import android.util.AtomicFile;
+import org.json.JSONArray;
+import org.json.JSONObject;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
+import java.util.*;
+
+/** Main-thread inbox. The server owns content; this device owns read/dismissed revisions. */
+final class AnnouncementInbox implements AutoCloseable {
+    interface Sender { void send(JSONObject request, String requestId); }
+    static final class Item {
+        final long id, revision, updatedAt;
+        final String title, body;
+        boolean read;
+        Item(JSONObject json) throws Exception {
+            id=integer(json,"id");revision=integer(json,"revision");updatedAt=integer(json,"updated_at");
+            title=string(json,"title");body=string(json,"body");
+            if(id<=0||revision<=0||updatedAt<=0||updatedAt>32_503_680_000L||
+                title.getBytes(StandardCharsets.UTF_8).length>240||body.getBytes(StandardCharsets.UTF_8).length>8000)
+                throw new IllegalArgumentException("Invalid announcement");
+        }
+    }
+    final List<Item> items=new ArrayList<>();
+    int total, unread;
+    boolean loaded, loading, failed, readSaveFailed, deleteFailed;
+    Sender sender;
+    Runnable changed=()->{};
+    private final File directory;
+    private final Handler handler=new Handler(Looper.getMainLooper());
+    private final Map<Long,Long> reads=new HashMap<>(), dismissed=new HashMap<>();
+    private Map<Long,Long> catalog=new LinkedHashMap<>(), pendingCatalog=new LinkedHashMap<>();
+    private final Map<Integer,List<Long>> pageIds=new HashMap<>();
+    private final Map<Integer,List<Item>> pageBodies=new HashMap<>();
+    private long catalogRevision=-1, pendingRevision=-1;
+    private int pendingTotal, pageOffset, visibleLimit=20;
+    private boolean summary=true, connected;
+    private String scope="", requestId;
+    private AtomicFile file;
+    private Runnable timeout;
+
+    AnnouncementInbox(File directory){this.directory=directory;}
+    boolean isConnected(){return connected;}
+    void configure(String host,int port,String deviceId){
+        if(host.isEmpty()||port<=0||deviceId.isEmpty())return;
+        String canonical=host.toLowerCase(Locale.ROOT);
+        if(canonical.endsWith("."))canonical=canonical.substring(0,canonical.length()-1);
+        String next=new JSONArray().put(canonical).put(port).put(deviceId).toString();
+        if(scope.equals(next))return;
+        boolean wasConnected=connected;reset();connected=wasConnected;scope=next;
+        try{
+            byte[] hash=MessageDigest.getInstance("SHA-256").digest(scope.getBytes(StandardCharsets.UTF_8));
+            StringBuilder name=new StringBuilder();for(byte b:hash)name.append(String.format(Locale.ROOT,"%02x",b&255));
+            file=new AtomicFile(new File(directory,name+".json"));loadLocalState();
+        }catch(Exception error){file=null;}
+        refresh();
+    }
+    void reset(){
+        cancelRequest();scope="";file=null;connected=false;items.clear();reads.clear();dismissed.clear();
+        catalog.clear();pendingCatalog.clear();pageIds.clear();pageBodies.clear();
+        catalogRevision=pendingRevision=-1;pendingTotal=pageOffset=total=unread=0;visibleLimit=20;
+        loaded=failed=readSaveFailed=deleteFailed=false;changed.run();
+    }
+    void setConnected(boolean value){
+        if(connected==value)return;connected=value;
+        if(value)refresh();else{cancelRequest();changed.run();}
+    }
+    void refresh(){
+        cancelRequest();pendingCatalog=new LinkedHashMap<>();pendingRevision=-1;pendingTotal=0;summary=true;
+        request(0);changed.run();
+    }
+    void loadMore(){
+        if(!connected||loading||failed||catalogRevision<0||visibleLimit>=total)return;
+        visibleLimit+=Math.min(20,total-visibleLimit);rebuild();changed.run();
+    }
+    Item find(long id,long revision){
+        for(Item item:items)if(item.id==id&&item.revision==revision)return item;return null;
+    }
+    void markRead(Item item){
+        if(find(item.id,item.revision)==null||Objects.equals(reads.get(item.id),item.revision))return;
+        Map<Long,Long> updated=new HashMap<>(reads);updated.put(item.id,item.revision);
+        if(!saveLocalState(updated,dismissed)){readSaveFailed=true;changed.run();return;}
+        reads.clear();reads.putAll(updated);readSaveFailed=deleteFailed=false;updateReadingState();changed.run();
+    }
+    void dismiss(Item item){
+        if(find(item.id,item.revision)==null){deleteFailed=true;changed.run();return;}
+        Map<Long,Long> updated=new HashMap<>(dismissed);updated.put(item.id,item.revision);
+        if(!saveLocalState(reads,updated)){deleteFailed=true;changed.run();return;}
+        dismissed.clear();dismissed.putAll(updated);deleteFailed=readSaveFailed=false;
+        if(summary&&loading){items.removeIf(this::isDismissed);updateReadingState();}
+        else{cancelRequest();rebuild();}
+        changed.run();
+    }
+    void failed(String id){
+        if(!Objects.equals(requestId,id)||id==null)return;
+        cancelRequest();failed=true;changed.run();
+    }
+    void receive(JSONObject message){
+        Object identifier=message.opt("request_id");
+        if(!(identifier instanceof String)||!identifier.equals(requestId))return;
+        String id=(String)identifier;
+        try{
+            if(!"announcements".equals(string(message,"type"))||message.has("error"))throw new IllegalArgumentException();
+            Object summaryFlag=message.get("summary_only");
+            long offsetValue=integer(message,"offset"), totalValue=integer(message,"total");
+            long revision=integer(message,"catalog_revision");JSONArray entries=message.getJSONArray("items");
+            if(!(summaryFlag instanceof Boolean)||((Boolean)summaryFlag)!=summary||offsetValue<0||
+                totalValue<offsetValue||totalValue>Integer.MAX_VALUE||revision<0||
+                entries.length()!=Math.min(summary?200:20,totalValue-offsetValue))throw new IllegalArgumentException();
+            int offset=(int)offsetValue, count=(int)totalValue;
+            LinkedHashMap<Long,Long> entriesById=new LinkedHashMap<>();
+            for(int i=0;i<entries.length();i++){
+                JSONObject entry=entries.getJSONObject(i);long key=integer(entry,"id"), version=integer(entry,"revision");
+                if(key<=0||version<=0||entriesById.put(key,version)!=null)throw new IllegalArgumentException();
+            }
+            long expected=summary?pendingRevision:catalogRevision;
+            if(expected>=0&&expected!=revision){refresh();return;}
+            if(summary){
+                if(offset!=pendingCatalog.size()||(pendingRevision>=0&&pendingTotal!=count))throw new IllegalArgumentException();
+                for(Map.Entry<Long,Long> entry:entriesById.entrySet())
+                    if(pendingCatalog.put(entry.getKey(),entry.getValue())!=null)throw new IllegalArgumentException();
+                pendingRevision=revision;pendingTotal=count;cancelRequest();
+                if(pendingCatalog.size()<pendingTotal){request(pendingCatalog.size());changed.run();return;}
+                if(catalogRevision!=pendingRevision){pageIds.clear();pageBodies.clear();}
+                catalog=new LinkedHashMap<>(pendingCatalog);catalogRevision=pendingRevision;
+                reads.keySet().retainAll(catalog.keySet());dismissed.keySet().retainAll(catalog.keySet());
+            }else{
+                if(offset!=pageOffset||count!=catalog.size())throw new IllegalArgumentException();
+                List<Item> bodies=new ArrayList<>();
+                for(int i=0;i<entries.length();i++){
+                    Item item=new Item(entries.getJSONObject(i));
+                    if(!Objects.equals(catalog.get(item.id),item.revision))throw new IllegalArgumentException();
+                    // A repeated ID on another body page must not create duplicate rows.
+                    for(Map.Entry<Integer,List<Long>> page:pageIds.entrySet())
+                        if(page.getKey()!=offset&&page.getValue().contains(item.id))throw new IllegalArgumentException();
+                    bodies.add(item);
+                }
+                cancelRequest();pageIds.put(offset,new ArrayList<>(entriesById.keySet()));pageBodies.put(offset,bodies);
+            }
+            failed=false;rebuild();changed.run();
+        }catch(Exception error){failed(id);}
+    }
+    private void request(int offset){
+        if(!connected||scope.isEmpty())return;
+        String id=UUID.randomUUID().toString();
+        try{
+            JSONObject payload=new JSONObject().put("type","announcements_list").put("request_id",id)
+                .put("summary_only",summary).put("offset",offset);
+            requestId=id;loading=true;failed=false;timeout=()->failed(id);handler.postDelayed(timeout,12_000);
+            if(sender!=null)sender.send(payload,id);else failed(id);
+        }catch(Exception error){failed(id);}
+    }
+    private void cancelRequest(){
+        if(timeout!=null)handler.removeCallbacks(timeout);timeout=null;requestId=null;loading=false;
+    }
+    private boolean isDismissed(Item item){return Objects.equals(dismissed.get(item.id),item.revision);}
+    private void updateReadingState(){
+        total=unread=0;
+        for(Map.Entry<Long,Long> entry:catalog.entrySet()){
+            if(Objects.equals(dismissed.get(entry.getKey()),entry.getValue()))continue;
+            total++;if(!Objects.equals(reads.get(entry.getKey()),entry.getValue()))unread++;
+        }
+        for(Item item:items)item.read=Objects.equals(reads.get(item.id),item.revision);
+    }
+    private void rebuild(){
+        updateReadingState();int wanted=Math.min(visibleLimit,total), position=0;Integer nextOffset=null;
+        List<Item> visible=new ArrayList<>();Set<Integer> retainedPages=new HashSet<>();summary=false;
+        if(wanted>0)for(int offset=0;offset<catalog.size();offset+=20){
+            List<Long> ids=pageIds.get(offset);if(ids==null){nextOffset=offset;break;}
+            Set<Long> selection=new HashSet<>();
+            for(long id:ids){
+                Long revision=catalog.get(id);if(revision==null||Objects.equals(dismissed.get(id),revision))continue;
+                if(position<wanted)selection.add(id);position++;
+            }
+            if(selection.isEmpty()){pageBodies.remove(offset);continue;}
+            retainedPages.add(offset);List<Item> bodies=pageBodies.get(offset);
+            if(bodies==null){nextOffset=offset;break;}
+            for(Item item:bodies)if(selection.contains(item.id))visible.add(item);
+            if(visible.size()==wanted)break;
+        }
+        if(visible.size()==wanted)pageBodies.keySet().retainAll(retainedPages);
+        else{
+            Set<Long> retained=new HashSet<>();for(Item item:visible)retained.add(item.id);
+            for(Item item:items)if(Objects.equals(catalog.get(item.id),item.revision)&&!isDismissed(item)&&retained.add(item.id)){
+                visible.add(item);if(visible.size()==wanted)break;
+            }
+        }
+        items.clear();items.addAll(visible);loaded=true;updateReadingState();
+        if(nextOffset!=null){pageOffset=nextOffset;request(nextOffset);}
+    }
+    private void loadLocalState(){
+        if(file==null||file.getBaseFile().length()>16*1024*1024)return;
+        try{
+            JSONObject saved=new JSONObject(new String(file.readFully(),StandardCharsets.UTF_8));
+            long version=integer(saved,"version");
+            if(!scope.equals(string(saved,"scope"))||(version!=1&&version!=2))return;
+            loadRevisions(saved.optJSONObject("reads"),reads);loadRevisions(saved.optJSONObject("dismissed"),dismissed);
+        }catch(Exception ignored){}
+    }
+    private static void loadRevisions(JSONObject json,Map<Long,Long> target){
+        if(json==null)return;
+        for(Iterator<String> keys=json.keys();keys.hasNext();){
+            String key=keys.next();
+            try{long id=Long.parseLong(key), revision=integer(json,key);if(id>0&&revision>0)target.put(id,revision);}catch(Exception ignored){}
+        }
+    }
+    private boolean saveLocalState(Map<Long,Long> readValues,Map<Long,Long> dismissedValues){
+        if(file==null)return false;FileOutputStream output=null;
+        try{
+            if(!directory.isDirectory()&&!directory.mkdirs())return false;
+            JSONObject saved=new JSONObject().put("version",2).put("scope",scope)
+                .put("reads",revisions(readValues)).put("dismissed",revisions(dismissedValues));
+            byte[] bytes=saved.toString().getBytes(StandardCharsets.UTF_8);
+            output=file.startWrite();output.write(bytes);output.getFD().sync();file.finishWrite(output);output=null;
+            // AtomicFile logs some rename failures instead of throwing; verify the committed file.
+            return Arrays.equals(bytes,file.readFully());
+        }catch(Exception error){if(output!=null)file.failWrite(output);return false;}
+    }
+    private static JSONObject revisions(Map<Long,Long> values)throws Exception{
+        JSONObject json=new JSONObject();for(Map.Entry<Long,Long> entry:values.entrySet())json.put(entry.getKey().toString(),entry.getValue());return json;
+    }
+    private static long integer(JSONObject json,String key)throws Exception{
+        Object value=json.get(key);if(!(value instanceof Integer)&&!(value instanceof Long))throw new IllegalArgumentException(key);
+        return ((Number)value).longValue();
+    }
+    private static String string(JSONObject json,String key)throws Exception{
+        Object value=json.get(key);if(!(value instanceof String))throw new IllegalArgumentException(key);return (String)value;
+    }
+    @Override public void close(){cancelRequest();connected=false;sender=null;changed=()->{};}
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/AnnouncementText.java

@@ -0,0 +1,72 @@
+package cn.crossdesk.mobile;
+
+import android.content.Intent;
+import android.net.Uri;
+import android.text.SpannableStringBuilder;
+import android.text.Spanned;
+import android.text.style.URLSpan;
+import android.view.View;
+import android.widget.Toast;
+import java.util.Locale;
+
+/** Plain text plus HTTP(S) links, matching iOS; never interpret HTML or arbitrary Markdown. */
+final class AnnouncementText {
+    static CharSequence format(String body){
+        String text=body.replace("\r\n","\n");SpannableStringBuilder result=new SpannableStringBuilder();
+        for(int position=0;position<text.length();){
+            if(text.charAt(position)=='['){
+                int labelEnd=text.indexOf(']',position+1), start=labelEnd+2;
+                if(labelEnd>position+1&&start<text.length()&&text.charAt(labelEnd+1)=='('&&
+                    !text.substring(position+1,labelEnd).matches("(?s).*[\\[\\]\\r\\n].*")&&hasScheme(text,start)){
+                    int end=urlEnd(text,start);
+                    if(end<text.length()&&text.charAt(end)==')'&&
+                        appendLink(result,text.substring(position+1,labelEnd),text.substring(start,end))){
+                        position=end+1;continue;
+                    }
+                }
+            }
+            if(hasScheme(text,position)){
+                int end=urlEnd(text,position);
+                while(end>position&&".,;:!?".indexOf(text.charAt(end-1))>=0)end--;
+                String address=text.substring(position,end);
+                if(appendLink(result,address,address)){position=end;continue;}
+            }
+            result.append(text.charAt(position++));
+        }
+        return result;
+    }
+    static boolean isWebURL(String address){
+        if(address==null)return false;
+        for(int i=0;i<address.length();i++){char c=address.charAt(i);if(c<=0x20||c==0x7f||"\\<>\"".indexOf(c)>=0)return false;}
+        Uri uri=Uri.parse(address);String scheme=uri.getScheme(),host=uri.getHost();
+        return scheme!=null&&(scheme.equalsIgnoreCase("http")||scheme.equalsIgnoreCase("https"))&&host!=null&&!host.isEmpty();
+    }
+    private static boolean hasScheme(String text,int start){
+        String prefix=text.substring(start,Math.min(text.length(),start+8)).toLowerCase(Locale.ROOT);
+        return prefix.startsWith("https://")||prefix.startsWith("http://");
+    }
+    private static int urlEnd(String text,int start){
+        int parentheses=0,brackets=0,end=start;
+        for(;end<text.length();end++){
+            char c=text.charAt(end);
+            if(c<=0x20||c==0x7f||c=='\\'||c==96||"<>\"'{}，。；：！？、（）【】《》「」『』“”‘’".indexOf(c)>=0)break;
+            if(c=='(')parentheses++;
+            if(c==')'){if(parentheses==0)break;parentheses--;}
+            if(c=='[')brackets++;
+            if(c==']'){if(brackets==0)break;brackets--;}
+        }
+        return end;
+    }
+    private static boolean appendLink(SpannableStringBuilder result,String label,String destination){
+        if(!isWebURL(destination))return false;
+        int start=result.length();result.append(label);
+        result.setSpan(new URLSpan(destination){
+            @Override public void onClick(View widget){
+                if(!isWebURL(getURL()))return;
+                try{widget.getContext().startActivity(new Intent(Intent.ACTION_VIEW,Uri.parse(getURL())).addCategory(Intent.CATEGORY_BROWSABLE));}
+                catch(android.content.ActivityNotFoundException error){Toast.makeText(widget.getContext(),"没有可打开网页的浏览器",Toast.LENGTH_SHORT).show();}
+            }
+        },start,result.length(),Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+        return true;
+    }
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/AnnouncementView.java

@@ -0,0 +1,170 @@
+package cn.crossdesk.mobile;
+
+import android.app.AlertDialog;
+import android.content.res.ColorStateList;
+import android.graphics.Color;
+import android.text.TextUtils;
+import android.text.method.LinkMovementMethod;
+import android.view.*;
+import android.widget.*;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+import java.util.function.Consumer;
+import static cn.crossdesk.mobile.MobileUi.*;
+
+/** Grouped announcement list and plain-text detail, sharing the iOS presentation. */
+@android.annotation.SuppressLint("ViewConstructor")
+final class AnnouncementView extends ScrollView {
+    private final MobileUi ui;
+    private final AnnouncementInbox inbox;
+    private final LinearLayout content;
+    private final Consumer<AnnouncementInbox.Item> open;
+    private final Runnable authorize;
+    private final boolean detail;
+    private final long id,revision;
+    private final SimpleDateFormat dates=new SimpleDateFormat("yyyy-MM-dd HH:mm",Locale.getDefault());
+    private TextView countLabel;
+    private AlertDialog deleteDialog;
+    private float downX,downY;
+    private boolean pulling,canPull;
+    private final int slop;
+
+    AnnouncementView(MobileUi ui,AnnouncementInbox inbox,AnnouncementInbox.Item selected,
+                     Consumer<AnnouncementInbox.Item> open,Runnable authorize){
+        super(ui.context);this.ui=ui;this.inbox=inbox;this.open=open;this.authorize=authorize;
+        detail=selected!=null;id=detail?selected.id:0;revision=detail?selected.revision:0;
+        slop=ViewConfiguration.get(getContext()).getScaledTouchSlop();
+        setFillViewport(true);setScrollBarStyle(SCROLLBARS_OUTSIDE_OVERLAY);
+        content=ui.column();content.setPadding(ui.dp(20),ui.dp(detail?20:16),ui.dp(20),ui.dp(28));
+        addView(content,new ScrollView.LayoutParams(-1,-2));
+        setOnScrollChangeListener((v,x,y,oldX,oldY)->{if(y>oldY)loadVisiblePage();});
+        render();
+    }
+    void render(){
+        int y=getScrollY();content.removeAllViews();countLabel=null;
+        if(detail)renderDetail();else renderList();
+        post(()->{if(isAttachedToWindow()){scrollTo(0,y);loadVisiblePage();}});
+    }
+    private String date(AnnouncementInbox.Item item){return dates.format(new Date(item.updatedAt*1000));}
+    private TextView message(String value,int color){
+        TextView text=ui.text(value,14,false);text.setTextColor(color);text.setLineSpacing(ui.dp(3),1);return text;
+    }
+    private void renderList(){
+        if(inbox.deleteFailed){content.addView(message("无法删除这条公告，请重试。",RED));ui.gap(content,12);}
+        if(!inbox.isConnected()){
+            content.addView(message("连接服务器后可获取最新公告。",SECONDARY));
+            content.addView(ui.action("连接服务器",BLUE,authorize));ui.gap(content,8);
+        }else if(inbox.failed){
+            LinearLayout error=ui.row();error.addView(message("公告加载失败，请重试。",SECONDARY),new LinearLayout.LayoutParams(0,-2,1));
+            error.addView(ui.action("重试",BLUE,inbox::refresh),ui.size(64,48));content.addView(error);ui.gap(content,8);
+        }
+        countLabel=ui.text("共 "+inbox.total+" 条 · "+inbox.unread+" 条未读",13,false);
+        countLabel.setTextColor(SECONDARY);countLabel.setPadding(ui.dp(16),ui.dp(8),0,ui.dp(8));content.addView(countLabel);
+        LinearLayout card=ui.column();ui.card(card,12);content.addView(card);
+        for(AnnouncementInbox.Item item:inbox.items){
+            if(card.getChildCount()>0)ui.divider(card);
+            card.addView(itemRow(item),ui.size(-1,-2));
+        }
+        if(inbox.loading){
+            LinearLayout loading=ui.row();loading.setGravity(Gravity.CENTER);loading.setPadding(0,ui.dp(18),0,ui.dp(18));
+            ProgressBar spinner=new ProgressBar(getContext());spinner.setIndeterminateTintList(ColorStateList.valueOf(BLUE));loading.addView(spinner,ui.size(20,20));
+            TextView label=message("加载中…",SECONDARY);label.setPadding(ui.dp(10),0,0,0);loading.addView(label);card.addView(loading);
+        }else if(inbox.items.size()<inbox.total&&!inbox.failed){
+            TextView more=ui.action("加载更多",BLUE,inbox::loadMore);more.setEnabled(inbox.isConnected());card.addView(more,ui.size(-1,48));
+        }else if(inbox.loaded&&inbox.total==0&&!inbox.failed&&inbox.isConnected()){
+            TextView empty=message("暂无公告",SECONDARY);empty.setGravity(Gravity.CENTER);card.addView(empty,ui.size(-1,120));
+        }
+    }
+    private View itemRow(AnnouncementInbox.Item item){
+        LinearLayout row=ui.row();row.setBackgroundColor(Color.WHITE);row.setPadding(ui.dp(16),ui.dp(16),ui.dp(12),ui.dp(16));
+        LinearLayout words=ui.column();
+        LinearLayout top=ui.row();top.setGravity(Gravity.TOP);
+        View dot=new View(getContext());dot.setBackground(ui.background(item.read?Color.TRANSPARENT:BLUE,4));
+        LinearLayout.LayoutParams dotLayout=ui.size(7,7);dotLayout.topMargin=ui.dp(7);dotLayout.rightMargin=ui.dp(10);top.addView(dot,dotLayout);
+        TextView title=ui.text(item.title,16,!item.read);title.setMaxLines(2);title.setEllipsize(TextUtils.TruncateAt.END);
+        words.addView(title,ui.size(-1,-2));ui.gap(words,7);TextView date=ui.text(date(item),12,false);date.setTextColor(SECONDARY);words.addView(date);
+        top.addView(words,new LinearLayout.LayoutParams(0,-2,1));row.addView(top,new LinearLayout.LayoutParams(0,-2,1));
+        TextView chevron=ui.text("›",23,false);chevron.setTextColor(0xFFB7B7BD);chevron.setPadding(ui.dp(10),0,0,0);row.addView(chevron);
+        row.setContentDescription(item.title+"，"+date(item)+"，"+(item.read?"已读":"未读"));row.setFocusable(true);
+        row.setOnClickListener(v->open.accept(item));row.setOnLongClickListener(v->{confirmDelete(item);return true;});
+        return new SwipeRow(row,()->confirmDelete(item));
+    }
+    private void confirmDelete(AnnouncementInbox.Item item){
+        if(deleteDialog!=null)deleteDialog.dismiss();
+        deleteDialog=new AlertDialog.Builder(getContext()).setTitle("删除公告").setMessage("删除这条公告？")
+            .setNegativeButton("取消",null).setPositiveButton("删除",(dialog,which)->inbox.dismiss(item)).show();
+    }
+    private void renderDetail(){
+        AnnouncementInbox.Item item=inbox.find(id,revision);
+        if(item==null){content.addView(message("这条公告已更新或删除，请返回公告列表查看。",SECONDARY));return;}
+        content.addView(ui.text(item.title,22,true));ui.gap(content,16);
+        TextView date=ui.text(date(item)+" · "+(item.read?"已读":"未读"),12,false);date.setTextColor(SECONDARY);content.addView(date);ui.gap(content,16);
+        if(inbox.readSaveFailed){
+            content.addView(message("无法保存本地阅读状态，请重试。",RED));
+            content.addView(ui.action("重试保存阅读状态",BLUE,()->inbox.markRead(item)));ui.gap(content,16);
+        }
+        TextView body=ui.text("",17,false);body.setText(AnnouncementText.format(item.body));body.setTextIsSelectable(true);
+        body.setMovementMethod(LinkMovementMethod.getInstance());body.setLinksClickable(true);body.setLinkTextColor(BLUE);body.setLineSpacing(ui.dp(4),1);
+        content.addView(body,ui.size(-1,-2));
+    }
+    private void loadVisiblePage(){
+        if(!detail&&isAttachedToWindow()&&inbox.isConnected()&&!inbox.loading&&!inbox.failed&&inbox.items.size()<inbox.total&&
+            content.getHeight()>0&&getHeight()>0&&getScrollY()+getHeight()>=content.getHeight()-ui.dp(48))inbox.loadMore();
+    }
+    private void trackPull(MotionEvent event){
+        if(!detail&&inbox.isConnected()&&!inbox.loading){
+            if(event.getActionMasked()==MotionEvent.ACTION_DOWN){downX=event.getX();downY=event.getY();pulling=false;canPull=getScrollY()==0;}
+            else if(event.getActionMasked()==MotionEvent.ACTION_MOVE&&canPull&&getScrollY()==0&&
+                event.getY()-downY>slop&&event.getY()-downY>Math.abs(event.getX()-downX))pulling=true;
+        }
+    }
+    @Override public boolean onInterceptTouchEvent(MotionEvent event){
+        trackPull(event);return pulling||super.onInterceptTouchEvent(event);
+    }
+    @android.annotation.SuppressLint("ClickableViewAccessibility") // Pull gesture only; toolbar refresh is the accessible action.
+    @Override public boolean onTouchEvent(MotionEvent event){
+        trackPull(event);
+        if(!pulling)return super.onTouchEvent(event);
+        boolean reached=event.getY()-downY>=ui.dp(72);
+        if(event.getActionMasked()==MotionEvent.ACTION_MOVE&&countLabel!=null)countLabel.setText(reached?"松开刷新":"下拉刷新");
+        if(event.getActionMasked()==MotionEvent.ACTION_UP||event.getActionMasked()==MotionEvent.ACTION_CANCEL){
+            pulling=false;if(reached&&event.getActionMasked()==MotionEvent.ACTION_UP)inbox.refresh();else render();
+        }
+        return true;
+    }
+    @Override protected void onDetachedFromWindow(){if(deleteDialog!=null)deleteDialog.dismiss();super.onDetachedFromWindow();}
+
+    /** Reveal a delete action without interfering with vertical scrolling or row taps. */
+    private final class SwipeRow extends FrameLayout {
+        private final View front,remove;
+        private float x,y,origin;
+        private boolean dragging;
+        SwipeRow(View front,Runnable delete){
+            super(ui.context);this.front=front;setClipChildren(true);
+            remove=ui.action("删除",Color.WHITE,delete);remove.setBackgroundColor(RED);
+            remove.setVisibility(INVISIBLE);
+            remove.setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS);remove.setFocusable(false);
+            addView(remove,new FrameLayout.LayoutParams(ui.dp(76),-1,Gravity.END));addView(front,new FrameLayout.LayoutParams(-1,-2));
+        }
+        @Override public boolean onInterceptTouchEvent(MotionEvent event){
+            if(event.getActionMasked()==MotionEvent.ACTION_DOWN){front.animate().cancel();x=event.getX();y=event.getY();origin=front.getTranslationX();dragging=false;}
+            if(event.getActionMasked()==MotionEvent.ACTION_MOVE&&Math.abs(event.getX()-x)>slop&&Math.abs(event.getX()-x)>Math.abs(event.getY()-y)){
+                dragging=true;remove.setVisibility(VISIBLE);getParent().requestDisallowInterceptTouchEvent(true);return true;
+            }
+            return super.onInterceptTouchEvent(event);
+        }
+        @android.annotation.SuppressLint("ClickableViewAccessibility") // Taps/long presses belong to the accessible row and delete button.
+        @Override public boolean onTouchEvent(MotionEvent event){
+            if(!dragging)return super.onTouchEvent(event);
+            int direction=getLayoutDirection()==LAYOUT_DIRECTION_RTL?1:-1;
+            if(event.getActionMasked()==MotionEvent.ACTION_MOVE)front.setTranslationX(direction*Math.max(0,Math.min(ui.dp(76),direction*(origin+event.getX()-x))));
+            if(event.getActionMasked()==MotionEvent.ACTION_UP||event.getActionMasked()==MotionEvent.ACTION_CANCEL){
+                boolean expanded=Math.abs(front.getTranslationX())>ui.dp(38);dragging=false;
+                front.animate().translationX(expanded?direction*ui.dp(76):0).setDuration(150).withEndAction(()->{if(!expanded)remove.setVisibility(INVISIBLE);}).start();
+                remove.setFocusable(expanded);remove.setImportantForAccessibility(expanded?IMPORTANT_FOR_ACCESSIBILITY_YES:IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS);
+            }
+            return true;
+        }
+    }
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/AudioPlayer.java

@@ -0,0 +1,49 @@
+package cn.crossdesk.mobile;
+
+import android.media.AudioAttributes;
+import android.media.AudioFormat;
+import android.media.AudioTrack;
+import java.util.concurrent.ArrayBlockingQueue;
+
+/** Bounded audio queue: network callbacks never block on the speaker. */
+final class AudioPlayer implements AutoCloseable {
+    private final ArrayBlockingQueue<byte[]> queue = new ArrayBlockingQueue<>(20);
+    private volatile boolean closed;
+    private volatile boolean enabled = true;
+    private final Thread thread = new Thread(this::play, "CrossDesk audio");
+    AudioPlayer() { thread.start(); }
+    void offer(byte[] pcm) {
+        if (!closed && enabled && !queue.offer(pcm)) { queue.poll(); queue.offer(pcm); }
+    }
+    void setEnabled(boolean value) { enabled = value; queue.clear(); }
+    private void play() {
+        AudioTrack track = null;
+        try {
+            int minimum = AudioTrack.getMinBufferSize(48000, AudioFormat.CHANNEL_OUT_MONO, AudioFormat.ENCODING_PCM_16BIT);
+            track = new AudioTrack.Builder()
+                    .setAudioAttributes(new AudioAttributes.Builder().setUsage(AudioAttributes.USAGE_MEDIA)
+                            .setContentType(AudioAttributes.CONTENT_TYPE_MOVIE).build())
+                    .setAudioFormat(new AudioFormat.Builder().setSampleRate(48000)
+                            .setChannelMask(AudioFormat.CHANNEL_OUT_MONO).setEncoding(AudioFormat.ENCODING_PCM_16BIT).build())
+                    .setBufferSizeInBytes(Math.max(minimum, 9600)).setTransferMode(AudioTrack.MODE_STREAM).build();
+            track.play();
+            while (!closed) {
+                byte[] data = queue.take();
+                if (!enabled) continue;
+                int offset = 0;
+                while (!closed && enabled && offset < data.length) {
+                    int written = track.write(data, offset, data.length - offset, AudioTrack.WRITE_BLOCKING);
+                    if (written <= 0) break;
+                    offset += written;
+                }
+            }
+        } catch (InterruptedException ignored) {
+            Thread.currentThread().interrupt();
+        } catch (IllegalArgumentException | IllegalStateException ignored) {
+            // Devices with unavailable output can still operate as a silent controller.
+        } finally {
+            if (track != null) { track.release(); }
+        }
+    }
+    @Override public void close() { closed = true; queue.clear(); thread.interrupt(); }
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/KeyMap.java

@@ -0,0 +1,61 @@
+package cn.crossdesk.mobile;
+
+import android.view.KeyEvent;
+
+final class KeyMap {
+    static int windowsCode(int code) {
+        if (code >= KeyEvent.KEYCODE_A && code <= KeyEvent.KEYCODE_Z) return 0x41 + code - KeyEvent.KEYCODE_A;
+        if (code >= KeyEvent.KEYCODE_0 && code <= KeyEvent.KEYCODE_9) return 0x30 + code - KeyEvent.KEYCODE_0;
+        if (code >= KeyEvent.KEYCODE_F1 && code <= KeyEvent.KEYCODE_F12) return 0x70 + code - KeyEvent.KEYCODE_F1;
+        return switch (code) {
+            case KeyEvent.KEYCODE_ENTER, KeyEvent.KEYCODE_NUMPAD_ENTER -> 0x0D;
+            case KeyEvent.KEYCODE_DEL -> 0x08;
+            case KeyEvent.KEYCODE_FORWARD_DEL -> 0x2E;
+            case KeyEvent.KEYCODE_TAB -> 0x09;
+            case KeyEvent.KEYCODE_ESCAPE -> 0x1B;
+            case KeyEvent.KEYCODE_SPACE -> 0x20;
+            case KeyEvent.KEYCODE_SHIFT_LEFT, KeyEvent.KEYCODE_SHIFT_RIGHT -> 0x10;
+            case KeyEvent.KEYCODE_CTRL_LEFT, KeyEvent.KEYCODE_CTRL_RIGHT -> 0x11;
+            case KeyEvent.KEYCODE_ALT_LEFT, KeyEvent.KEYCODE_ALT_RIGHT -> 0x12;
+            case KeyEvent.KEYCODE_META_LEFT, KeyEvent.KEYCODE_META_RIGHT -> 0x5B;
+            case KeyEvent.KEYCODE_DPAD_LEFT -> 0x25;
+            case KeyEvent.KEYCODE_DPAD_UP -> 0x26;
+            case KeyEvent.KEYCODE_DPAD_RIGHT -> 0x27;
+            case KeyEvent.KEYCODE_DPAD_DOWN -> 0x28;
+            case KeyEvent.KEYCODE_MOVE_HOME -> 0x24;
+            case KeyEvent.KEYCODE_MOVE_END -> 0x23;
+            case KeyEvent.KEYCODE_PAGE_UP -> 0x21;
+            case KeyEvent.KEYCODE_PAGE_DOWN -> 0x22;
+            case KeyEvent.KEYCODE_MINUS -> 0xBD;
+            case KeyEvent.KEYCODE_EQUALS -> 0xBB;
+            case KeyEvent.KEYCODE_LEFT_BRACKET -> 0xDB;
+            case KeyEvent.KEYCODE_RIGHT_BRACKET -> 0xDD;
+            case KeyEvent.KEYCODE_BACKSLASH -> 0xDC;
+            case KeyEvent.KEYCODE_SEMICOLON -> 0xBA;
+            case KeyEvent.KEYCODE_APOSTROPHE -> 0xDE;
+            case KeyEvent.KEYCODE_COMMA -> 0xBC;
+            case KeyEvent.KEYCODE_PERIOD -> 0xBE;
+            case KeyEvent.KEYCODE_SLASH -> 0xBF;
+            case KeyEvent.KEYCODE_GRAVE -> 0xC0;
+            default -> 0;
+        };
+    }
+    // High bit is the Shift modifier; zero means use the clipboard for this text.
+    static int ascii(char ch) {
+        if (ch >= 'a' && ch <= 'z') return ch - 'a' + 0x41;
+        if (ch >= 'A' && ch <= 'Z') return ch | 0x100;
+        if (ch >= '0' && ch <= '9') return ch;
+        if (ch == '\n') return 0x0D;
+        if (ch == '\t') return 0x09;
+        if (ch == ' ') return 0x20;
+        String plain = "-=[]\\;',./`";
+        String shifted = "_+{}|:\"<>?~";
+        int[] codes = {0xBD,0xBB,0xDB,0xDD,0xDC,0xBA,0xDE,0xBC,0xBE,0xBF,0xC0};
+        int i = plain.indexOf(ch);
+        if (i >= 0) return codes[i];
+        i = shifted.indexOf(ch);
+        if (i >= 0) return codes[i] | 0x100;
+        i = ")!@#$%^&*(".indexOf(ch);
+        return i < 0 ? 0 : (0x30 + i) | 0x100;
+    }
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/LicenseCatalog.java

@@ -0,0 +1,58 @@
+package cn.crossdesk.mobile;
+
+import android.content.Context;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+/** Offline catalog; document bodies are loaded only when opened. */
+final class LicenseCatalog {
+    static final class Document {
+        final String title,asset;
+        Document(JSONObject value)throws JSONException{
+            title=value.getString("title");asset=value.getString("asset");
+            if(!asset.startsWith("about/")||asset.contains(".."))throw new JSONException("Invalid asset");
+        }
+    }
+    static final class Component {
+        final String id,name,version,license,sourceURL,buildSourceURL;
+        final List<Document> documents,buildDocuments;
+        Component(JSONObject value)throws JSONException{
+            id=value.getString("id");name=value.getString("name");version=value.getString("version");license=value.getString("license");
+            sourceURL=value.getString("sourceURL");buildSourceURL=value.optString("buildSourceURL","");
+            documents=documents(value.getJSONArray("documents"));buildDocuments=documents(value.optJSONArray("buildDocuments"));
+            if(documents.isEmpty())throw new JSONException("Missing documents");
+        }
+        String documentTitle(Document document){
+            if(document.title.equals("Source copyright and license notices"))return "版权与许可声明";
+            if(document.title.equals("apps/android/licenses/OPEN_SOURCE_NOTICE.txt"))return "开源软件权利说明";
+            if(id.equals("crossdesk")&&document.title.equals("LICENSE"))return "GNU GPL 第 3 版";
+            return document.title;
+        }
+    }
+    final List<Component> components=new ArrayList<>();
+    final JSONObject source;
+    LicenseCatalog(Context context)throws IOException,JSONException{
+        JSONObject data=new JSONObject(read(context,"ThirdPartyLicenses.json"));
+        if(data.getInt("schemaVersion")!=1)throw new JSONException("Unknown catalog");
+        JSONArray entries=data.getJSONArray("components");
+        for(int i=0;i<entries.length();i++)components.add(new Component(entries.getJSONObject(i)));
+        if(find("crossdesk")==null||find("openfec")==null)throw new JSONException("Incomplete catalog");
+        JSONObject metadata;
+        try{metadata=new JSONObject(read(context,"SourceMetadata.json"));if(metadata.getInt("schemaVersion")!=1)metadata=null;}catch(IOException|JSONException error){metadata=null;}
+        source=metadata;
+    }
+    Component find(String id){for(Component component:components)if(component.id.equals(id))return component;return null;}
+    static List<Document> documents(JSONArray values)throws JSONException{
+        List<Document> result=new ArrayList<>();if(values!=null)for(int i=0;i<values.length();i++)result.add(new Document(values.getJSONObject(i)));return result;
+    }
+    static String read(Context context,String asset)throws IOException{
+        try(var input=context.getAssets().open(asset);var output=new ByteArrayOutputStream()){
+            byte[] buffer=new byte[8192];int count;while((count=input.read(buffer))!=-1)output.write(buffer,0,count);return output.toString("UTF-8");
+        }
+    }
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/MainActivity.java

@@ -0,0 +1,516 @@
+package cn.crossdesk.mobile;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.content.ClipData;
+import android.content.ClipboardManager;
+import android.content.SharedPreferences;
+import android.content.pm.ActivityInfo;
+import android.content.res.ColorStateList;
+import android.content.res.Configuration;
+import android.graphics.Color;
+import android.graphics.Typeface;
+import android.graphics.drawable.GradientDrawable;
+import android.os.Bundle;
+import android.text.*;
+import android.text.method.PasswordTransformationMethod;
+import android.view.*;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.*;
+import org.json.JSONArray;
+import org.json.JSONObject;
+import java.util.HashSet;
+import java.util.Set;
+
+import static cn.crossdesk.mobile.MobileUi.*;
+
+public final class MainActivity extends Activity implements NativeSession.Listener {
+    private MobileUi ui;
+    private PageHost pageHost;
+    private AboutPages aboutPages;
+    private boolean navigatingBack;
+    private FrameLayout canvas;
+    private LinearLayout root;
+    private EditText remote;
+    private TextView status, signalBadge, identitySummary;
+    private AnnouncementInbox announcementInbox;
+    private AnnouncementView announcementView;
+    private TextView announcementBadge;
+    private View announcementRefresh;
+    private String announcementServer="";
+    private SharedPreferences preferences;
+    private RecentConnections history;
+    private final RecentConnectionPresence recentPresence=new RecentConnectionPresence();
+    private LinearLayout recentGrid;
+    private final Runnable presenceTick=new Runnable(){public void run(){
+        if(!recentPresence.isConnected())return;
+        recentPresence.maintain(android.os.SystemClock.elapsedRealtime());
+        mainHandler.postDelayed(this,1000);
+    }};
+    private RemotePreviewStore previews;
+    private RemotePreviewStore.Capture previewCapture;
+    private boolean previewCopying,updatingPreviewSwitch;
+    private int previewAttempts;
+    private Switch previewSwitch;
+    private TextView clearPreviewsButton,previewCleanupError;
+    private AlertDialog previewDialog;
+    private final java.util.List<Runnable> previewCards=new java.util.ArrayList<>();
+    private final Runnable previewChanged=this::renderPreviews;
+    private NativeSession session, signaling;
+    private String signalingServer="", localIdentity="", signalError="";
+    private int signalState=-1;
+    private boolean foreground;
+    private RemoteVideoView video;
+    private SessionControls controls;
+    private Dialog passwordDialog, progressDialog, privacyDialog;
+    private AlertDialog disconnectDialog;
+    private AlertDialog remoteUpdateDialog;
+    private RemoteVersionCheck remoteVersionCheck;
+    private String host, connectedRemote="", hostPlatform="", remoteClipboard="", pendingPassword="", page="home";
+    private int port,selectedDisplay;
+    private JSONArray displays=new JSONArray();
+    private boolean muted,ready,rememberPassword;
+    private RemoteVideoSettings videoSettings=new RemoteVideoSettings(1);
+    private final android.os.Handler mainHandler=new android.os.Handler(android.os.Looper.getMainLooper());
+    private Runnable videoSettingsTimeout;
+    private final Set<Integer> pressed=new HashSet<>();
+    private Runnable backAction;
+
+    @Override public void onCreate(Bundle state){
+        super.onCreate(state);ui=new MobileUi(this);history=new RecentConnections(this);
+        pageHost=new PageHost(this);setContentView(pageHost);
+        preferences=getSharedPreferences("settings",MODE_PRIVATE);host=preferences.getString("host","api.crossdesk.cn");port=preferences.getInt("port",9099);
+        recentPresence.sender=ids->{if(signaling!=null&&!signaling.isClosed())signaling.presenceRequest(ids);};
+        recentPresence.changed=this::renderRecentConnections;
+        remoteVersionCheck=new RemoteVersionCheck(this::showRemoteUpdate);
+        previews=RemotePreviewStore.get(this);previews.addListener(previewChanged);previews.enforceConsent();
+        announcementInbox=new AnnouncementInbox(new java.io.File(getNoBackupFilesDir(),"AnnouncementReads"));
+        announcementInbox.sender=(request,id)->{if(signaling!=null&&!signaling.isClosed())signaling.announcementRequest(request,id);else announcementInbox.failed(id);};
+        announcementInbox.changed=this::renderAnnouncements;
+        if(android.os.Build.VERSION.SDK_INT>=33)getOnBackInvokedDispatcher().registerOnBackInvokedCallback(android.window.OnBackInvokedDispatcher.PRIORITY_DEFAULT,this::back);
+        home("");
+    }
+    private int dp(float value){return ui.dp(value);}
+    private LinearLayout column(){return ui.column();}
+    private LinearLayout row(){return ui.row();}
+    private TextView text(String title,int size,boolean bold){return ui.text(title,size,bold);}
+    private String serverKey(){return host+":"+port;}
+    private void toast(String value){Toast.makeText(this,value,Toast.LENGTH_SHORT).show();}
+    private void hideKeyboard(){((InputMethodManager)getSystemService(INPUT_METHOD_SERVICE)).hideSoftInputFromWindow(root.getWindowToken(),0);root.clearFocus();}
+    private void installRoot(String nextPage,boolean dark){
+        PageHost.Motion motion=PageHost.Motion.NONE;
+        if(canvas!=null&&foreground&&!page.equals(nextPage)){
+            if(nextPage.equals("session"))motion=PageHost.Motion.SESSION_IN;
+            else if(page.equals("session"))motion=PageHost.Motion.SESSION_OUT;
+            else motion=navigatingBack||nextPage.equals("home")?PageHost.Motion.POP:PageHost.Motion.PUSH;
+        }
+        if(root!=null)hideKeyboard();page=nextPage;
+        signalBadge=null;identitySummary=null;announcementBadge=null;announcementView=null;announcementRefresh=null;
+        previewSwitch=null;clearPreviewsButton=null;previewCleanupError=null;previewCards.clear();recentGrid=null;
+        canvas=new FrameLayout(this);canvas.setBackgroundColor(dark?Color.BLACK:BACKGROUND);
+        root=column();canvas.addView(root,new FrameLayout.LayoutParams(-1,-1));
+        root.setOnApplyWindowInsetsListener((view,insets)->{
+            view.setPadding(insets.getSystemWindowInsetLeft(),insets.getSystemWindowInsetTop(),insets.getSystemWindowInsetRight(),insets.getSystemWindowInsetBottom());return insets;
+        });
+        root.setFocusableInTouchMode(true);pageHost.show(canvas,motion);
+        applySystemBars(dark);
+    }
+    private void applySystemBars(boolean dark){
+        if(android.os.Build.VERSION.SDK_INT>=30){
+            android.view.WindowInsetsController controller=getWindow().getInsetsController();
+            if(controller!=null){int light=android.view.WindowInsetsController.APPEARANCE_LIGHT_STATUS_BARS|android.view.WindowInsetsController.APPEARANCE_LIGHT_NAVIGATION_BARS;controller.setSystemBarsAppearance(dark?0:light,light);}
+        }else getWindow().getDecorView().setSystemUiVisibility(dark?0:View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR|View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
+    }
+    private EditText field(String hint,int type){
+        EditText v=new EditText(this);v.setHint(hint);v.setContentDescription(hint);v.setInputType(type);v.setSingleLine(true);v.setTextSize(17);v.setTextColor(INK);v.setHintTextColor(SECONDARY);
+        v.setPadding(dp(14),0,dp(14),0);v.setBackground(ui.background(BACKGROUND,12));v.setImportantForAutofill(View.IMPORTANT_FOR_AUTOFILL_NO);return v;
+    }
+    private LinearLayout navigation(String title,Runnable back){
+        LinearLayout bar=row();bar.setPadding(dp(12),0,dp(12),0);root.addView(bar,ui.size(-1,56));
+        bar.addView(ui.iconButton("back","返回",this::navigateBack),ui.size(44,44));
+        TextView label=text(title,17,true);label.setGravity(Gravity.CENTER);label.setSingleLine();label.setEllipsize(TextUtils.TruncateAt.END);bar.addView(label,new LinearLayout.LayoutParams(0,-1,1));
+        bar.addView(new View(this),ui.size(44,44));backAction=back;return bar;
+    }
+    LinearLayout formPage(String name,String title,Runnable back){
+        installRoot(name,false);navigation(title,back);ScrollView scroll=new ScrollView(this);scroll.setFillViewport(true);root.addView(scroll,new LinearLayout.LayoutParams(-1,0,1));
+        LinearLayout content=column();content.setPadding(dp(20),dp(16),dp(20),dp(28));scroll.addView(content);return content;
+    }
+    LinearLayout section(LinearLayout content,String title){
+        return section(content,title,12);
+    }
+    private LinearLayout section(LinearLayout content,String title,int radius){
+        if(!title.isEmpty()){TextView label=text(title,13,false);label.setTextColor(SECONDARY);label.setPadding(dp(16),dp(12),0,dp(8));content.addView(label);}
+        LinearLayout card=column();ui.card(card,radius);content.addView(card);return card;
+    }
+    void footer(LinearLayout content,String title){TextView v=text(title,12,false);v.setTextColor(SECONDARY);v.setLineSpacing(dp(3),1);v.setPadding(dp(16),dp(8),dp(16),dp(16));content.addView(v);}
+    void link(LinearLayout parent,String title,String detail,Runnable action){
+        LinearLayout item=row();item.setPadding(dp(16),dp(14),dp(12),dp(14));item.setMinimumHeight(dp(48));
+        item.addView(text(title,16,false),new LinearLayout.LayoutParams(0,-2,1));TextView value=text(detail,15,false);value.setTextColor(SECONDARY);item.addView(value);
+        TextView chevron=text(" ›",23,false);chevron.setTextColor(0xFFB7B7BD);item.addView(chevron);item.setContentDescription(title+(detail.isEmpty()?"":"，"+detail));item.setClickable(true);item.setFocusable(true);item.setOnClickListener(v->action.run());parent.addView(item);
+    }
+    @android.annotation.SuppressLint("SourceLockedOrientationActivity") // Match the iOS portrait home; sessions support both orientations.
+    private void home(String message){
+        backAction=null;setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);installRoot("home",false);
+        LinearLayout toolbar=row();toolbar.setPadding(dp(20),0,dp(20),0);root.addView(toolbar,ui.size(-1,56));
+        signalBadge=text("",12,true);signalBadge.setGravity(Gravity.CENTER);signalBadge.setPadding(dp(11),0,dp(11),0);signalBadge.setSingleLine(true);
+        signalBadge.setOnClickListener(v->{
+            if(!preferences.getBoolean("networkConsent",false))consent(this::renderSignaling);
+            else if(signalState==1)toast("已连接 "+serverKey());
+            else {stopSignaling();ensureSignaling();}
+        });renderSignaling();toolbar.addView(signalBadge,ui.size(-2,34));toolbar.addView(new View(this),new LinearLayout.LayoutParams(0,1,1));
+        FrameLayout bell=(FrameLayout)ui.iconButton("bell","通知公告",this::announcements);bell.setClipChildren(false);toolbar.setClipChildren(false);
+        announcementBadge=text("",10,true);announcementBadge.setTextColor(Color.WHITE);announcementBadge.setGravity(Gravity.CENTER);announcementBadge.setMinWidth(dp(16));announcementBadge.setPadding(dp(4),0,dp(4),0);announcementBadge.setBackground(ui.background(RED,12));announcementBadge.setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_NO);
+        FrameLayout.LayoutParams badgePosition=new FrameLayout.LayoutParams(-2,dp(16),Gravity.TOP|Gravity.END);badgePosition.topMargin=-dp(3);badgePosition.setMarginEnd(-dp(5));bell.addView(announcementBadge,badgePosition);renderAnnouncements();
+        toolbar.addView(bell,ui.size(40,40));View spacer=new View(this);toolbar.addView(spacer,ui.size(12,1));toolbar.addView(ui.iconButton("settings","设置",this::settings),ui.size(40,40));
+        LinearLayout content=column();content.setPadding(dp(20),dp(24),dp(20),dp(12));content.setClipChildren(false);content.setClipToPadding(false);root.addView(content,new LinearLayout.LayoutParams(-1,0,1));
+        LinearLayout connection=column();connection.setPadding(dp(18),dp(18),dp(18),dp(18));content.addView(ui.shadowCard(connection,20));
+        connection.addView(text("远程桌面",20,true));ui.gap(connection,16);
+        LinearLayout entry=row();connection.addView(entry,ui.size(-1,54));
+        remote=field("对端 ID",InputType.TYPE_CLASS_NUMBER);remote.setTextSize(20);remote.setTypeface(Typeface.create("sans-serif-medium",Typeface.NORMAL));
+        remote.setOnFocusChangeListener((view,focused)->{GradientDrawable shape=ui.background(BACKGROUND,12);shape.setStroke(dp(focused?2:1),focused?BLUE:LINE);remote.setBackground(shape);});
+        remote.setFilters(new InputFilter[]{new InputFilter.LengthFilter(11)});remote.setText(formatId(preferences.getString("lastRemote","")));
+        entry.addView(remote,new LinearLayout.LayoutParams(0,-1,1));
+        TextView connect=ui.primary("连接  →",()->promptConnection(id()));connect.setContentDescription("连接");LinearLayout.LayoutParams buttonParams=ui.size(96,54);buttonParams.leftMargin=dp(10);entry.addView(connect,buttonParams);
+        Runnable update=()->{connect.setEnabled(!id().isEmpty());connect.setAlpha(id().isEmpty()?.45f:1);};update.run();
+        remote.addTextChangedListener(new TextWatcher(){boolean editing;public void beforeTextChanged(CharSequence s,int start,int count,int after){}public void onTextChanged(CharSequence s,int start,int before,int count){update.run();}public void afterTextChanged(Editable value){if(editing)return;String formatted=formatId(value.toString());if(!formatted.equals(value.toString())){editing=true;int cursor=remote.getSelectionStart(),digits=value.subSequence(0,Math.max(0,cursor)).toString().replaceAll("[^0-9]","").length();remote.setText(formatted);remote.setSelection(Math.min(formatted.length(),digits+Math.max(0,digits-1)/3));editing=false;}}});
+        LinearLayout recent=column();recent.setPadding(dp(16),dp(16),dp(16),dp(16));ui.card(recent,18);LinearLayout.LayoutParams p=new LinearLayout.LayoutParams(-1,0,1);p.topMargin=dp(20);content.addView(recent,p);
+        JSONArray records=history.list(serverKey());recentPresence.watch(records,android.os.SystemClock.elapsedRealtime());LinearLayout heading=row();heading.addView(text("最近连接",20,true),new LinearLayout.LayoutParams(0,-2,1));
+        if(records.length()>0){TextView count=text(records.length()+" 台设备",12,false);count.setTextColor(SECONDARY);heading.addView(count);}recent.addView(heading);
+        if(records.length()==0){
+            LinearLayout empty=column();empty.setGravity(Gravity.CENTER);recent.addView(empty,new LinearLayout.LayoutParams(-1,0,1));empty.addView(ui.icon("history",0xFFB6B6BB),ui.size(34,34));ui.gap(empty,12);
+            TextView emptyTitle=text("还没有连接记录",17,true);emptyTitle.setGravity(Gravity.CENTER);empty.addView(emptyTitle);ui.gap(empty,8);TextView hint=text("成功连接后，这里会显示最近的远程设备。",13,false);hint.setTextColor(SECONDARY);hint.setGravity(Gravity.CENTER);empty.addView(hint);
+        }else{
+            ui.gap(recent,14);ScrollView scroll=new ScrollView(this);recent.addView(scroll,new LinearLayout.LayoutParams(-1,0,1));recentGrid=column();scroll.addView(recentGrid);renderRecentConnections();
+        }
+        ensureSignaling();
+        if(!message.isEmpty())new AlertDialog.Builder(this).setTitle("连接提示").setMessage(message).setPositiveButton("确定",null).show();
+    }
+    private String id(){return remote.getText().toString().replace(" ","");}
+    static String formatId(String value){String digits=value.replaceAll("[^0-9]","");if(digits.length()>9)digits=digits.substring(0,9);return digits.replaceAll("(.{3})(?=.)","$1 ");}
+    private void renderRecentConnections(){
+        if(recentGrid==null)return;
+        JSONArray records=recentPresence.ordered(history.list(serverKey()),android.os.SystemClock.elapsedRealtime());
+        recentGrid.removeAllViews();previewCards.clear();
+        for(int i=0;i<records.length();i+=2){LinearLayout line=row();line.setGravity(Gravity.TOP);recentGrid.addView(line);for(int j=i;j<i+2;j++){View card=j<records.length()?recentCard(records.optJSONObject(j)):new View(this);LinearLayout.LayoutParams cell=new LinearLayout.LayoutParams(0,-2,1);if(j>i)cell.leftMargin=dp(12);line.addView(card,cell);}ui.gap(recentGrid,12);}
+    }
+    private View recentCard(JSONObject item){
+        if(item==null)return new View(this);String id=item.optString("id"),platform=item.optString("platform");
+        LinearLayout card=column();ui.card(card,14);FrameLayout preview=new FrameLayout(this){@Override protected void onMeasure(int w,int h){super.onMeasure(w,MeasureSpec.makeMeasureSpec(MeasureSpec.getSize(w)*9/16,MeasureSpec.EXACTLY));}};
+        int color=platform.equals("windows")?0xFF316AB7:platform.equals("macos")?0xFF8057B9:platform.equals("linux")?0xFFAE642B:0xFF677587;preview.setBackgroundColor(color);
+        TextView label=text(platform.equals("windows")?"Windows":platform.equals("macos")?"macOS":platform.equals("linux")?"Linux":"远程电脑",19,true);label.setGravity(Gravity.CENTER);label.setTextColor(Color.WHITE);preview.addView(label,new FrameLayout.LayoutParams(-1,-1));card.addView(preview,ui.size(-1,80));
+        ImageView image=new ImageView(this);image.setScaleType(ImageView.ScaleType.CENTER_CROP);image.setVisibility(View.GONE);image.setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_NO);preview.addView(image,new FrameLayout.LayoutParams(-1,-1));
+        String server=serverKey();Runnable load=()->{if(!image.isAttachedToWindow())return;Object binding=new Object();image.setTag(binding);image.setImageDrawable(null);image.setVisibility(View.GONE);label.setVisibility(View.VISIBLE);
+            previews.load(server,id,bitmap->{if(image.getTag()!=binding||!image.isAttachedToWindow()){if(bitmap!=null)bitmap.recycle();return;}if(bitmap!=null){image.setImageBitmap(bitmap);image.setVisibility(View.VISIBLE);label.setVisibility(View.GONE);}});};previewCards.add(load);image.addOnAttachStateChangeListener(new View.OnAttachStateChangeListener(){public void onViewAttachedToWindow(View view){load.run();}public void onViewDetachedFromWindow(View view){image.setTag(null);}});if(image.isAttachedToWindow())load.run();
+        LinearLayout caption=column();caption.setPadding(dp(9),dp(9),dp(9),dp(9));TextView name=text(item.optString("name",id),12,true);name.setSingleLine();name.setEllipsize(TextUtils.TruncateAt.END);caption.addView(name);ui.gap(caption,4);
+        LinearLayout details=row();TextView detail=text("ID "+id,10,false);detail.setTypeface(Typeface.create("sans-serif",Typeface.NORMAL));detail.setTextColor(SECONDARY);detail.setSingleLine();detail.setEllipsize(TextUtils.TruncateAt.END);details.addView(detail,new LinearLayout.LayoutParams(0,-2,1));
+        if(item.optBoolean("remember")){View key=ui.icon("key",SECONDARY);key.setContentDescription("已保存密码");LinearLayout.LayoutParams keySize=ui.size(10,10);keySize.leftMargin=dp(4);details.addView(key,keySize);}
+        boolean online=recentPresence.isOnline(id,android.os.SystemClock.elapsedRealtime());String availability=online?"在线":"离线";TextView presence=text(availability,10,true);presence.setSingleLine();presence.setTextColor(online?GREEN:SECONDARY);LinearLayout.LayoutParams presenceSize=ui.size(-2,-2);presenceSize.leftMargin=dp(5);details.addView(presence,presenceSize);caption.addView(details);card.addView(caption);
+        card.setContentDescription("连接 "+item.optString("name",id)+"，ID "+id+(item.optBoolean("remember")?"，已保存密码":"")+"，"+availability);card.setClickable(true);card.setFocusable(true);card.setOnClickListener(v->{remote.setText(formatId(id));promptConnection(id);});
+        card.setOnLongClickListener(v->{new AlertDialog.Builder(this).setTitle(item.optString("name",id)).setItems(new String[]{"连接","删除记录"},(d,w)->{if(w==0)promptConnection(id);else{history.delete(serverKey(),id);home("");}}).show();return true;});return card;
+    }
+    private void promptConnection(String id){
+        hideKeyboard();if(!id.matches("[0-9]{9}")){remote.setError("请输入 9 位设备 ID");remote.requestFocus();return;}
+        if(!preferences.getBoolean("networkConsent",false)){consent(()->connectOrPrompt(id));return;}connectOrPrompt(id);
+    }
+    private void connectOrPrompt(String id){
+        String stored;
+        try{stored=history.password(serverKey(),id);}catch(Exception error){passwordSheet(id,"已保存密码无法读取，请重新输入",true);return;}
+        if(!stored.isEmpty()){rememberPassword=true;begin(id,stored);return;}
+        boolean remember=history.remembersPassword(serverKey(),id);
+        passwordSheet(id,remember?"已保存的密码未能保留，请重新输入一次":"",remember);
+    }
+    private void consent(Runnable accepted){
+        if(privacyDialog!=null&&privacyDialog.isShowing())return;
+        Dialog dialog=new PrivacyConsentDialog(this,ui,()->{
+            preferences.edit().putBoolean("networkConsent",true).apply();renderSignaling();ensureSignaling();accepted.run();
+        });
+        privacyDialog=dialog;dialog.setOnDismissListener(d->{if(privacyDialog==dialog)privacyDialog=null;});dialog.show();
+    }
+    private void passwordSheet(String id,String error,boolean rememberDefault){
+        Dialog dialog=new Dialog(this);passwordDialog=dialog;LinearLayout sheet=column();sheet.setPadding(dp(22),dp(10),dp(22),dp(22));sheet.setBackground(ui.background(BACKGROUND,24));
+        View handle=new View(this);handle.setBackground(ui.background(0xFFC6C6CB,3));LinearLayout.LayoutParams hp=ui.size(36,5);hp.gravity=Gravity.CENTER;sheet.addView(handle,hp);ui.gap(sheet,20);
+        LinearLayout header=row(),titles=column();titles.addView(text("连接远程桌面",22,true));ui.gap(titles,5);TextView subtitle=text("对端 ID  "+id,15,false);subtitle.setTextColor(SECONDARY);titles.addView(subtitle);header.addView(titles,new LinearLayout.LayoutParams(0,-2,1));header.addView(ui.iconButton("close","关闭",dialog::dismiss),ui.size(36,36));sheet.addView(header);ui.gap(sheet,18);
+        LinearLayout passwordRow=row();ui.card(passwordRow,10);EditText password=field("访问密码",InputType.TYPE_CLASS_TEXT|InputType.TYPE_TEXT_VARIATION_PASSWORD);password.setBackgroundColor(Color.TRANSPARENT);passwordRow.addView(password,new LinearLayout.LayoutParams(0,dp(50),1));
+        View eye=ui.iconButton("eye","显示密码",()->{boolean hidden=password.getTransformationMethod()!=null;password.setTransformationMethod(hidden?null:PasswordTransformationMethod.getInstance());password.setSelection(password.length());});passwordRow.addView(eye,ui.size(44,44));sheet.addView(passwordRow);ui.gap(sheet,18);
+        LinearLayout save=row(),saveText=column();saveText.addView(text("保存密码",15,true));ui.gap(saveText,3);TextView security=text("密码将加密保存在本机 Android Keystore 中",11,false);security.setTextColor(SECONDARY);saveText.addView(security);save.addView(saveText,new LinearLayout.LayoutParams(0,-2,1));Switch remember=new Switch(this);remember.setContentDescription("保存密码");save.addView(remember);sheet.addView(save);
+        remember.setChecked(rememberDefault);
+        ui.gap(sheet,18);TextView connect=ui.primary("连接  →",()->{
+            String secret=password.getText().toString();if(secret.isEmpty()||secret.length()>128||secret.contains("@")){password.setError("请输入有效访问密码");return;}
+            rememberPassword=remember.isChecked();password.setText("");dialog.dismiss();begin(id,secret);
+        });connect.setContentDescription("确认连接");sheet.addView(connect,ui.size(-1,48));
+        dialog.setContentView(sheet);Window window=dialog.getWindow();if(window!=null){window.setBackgroundDrawableResource(android.R.color.transparent);window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);window.setDimAmount(.22f);}dialog.show();if(window!=null){window.setLayout(-1,-2);window.setGravity(Gravity.BOTTOM);}password.requestFocus();if(!error.isEmpty())password.setError(error);
+        dialog.setOnDismissListener(d->{password.setText("");passwordDialog=null;});
+    }
+    private void begin(String id,String secret){
+        resetRemoteVersionCheck();
+        resetVideoSettings();
+        previewCapture=previews.begin(serverKey(),id);previewCopying=false;previewAttempts=0;
+        connectedRemote=id;pendingPassword=rememberPassword?secret:"";ready=false;muted=false;selectedDisplay=0;hostPlatform="";remoteClipboard="";displays=new JSONArray();preferences.edit().putString("lastRemote",id).apply();
+        ensureSignaling();
+        if(signaling==null){pendingPassword="";toast("请先完成联网授权");return;}
+        session=signaling;showProgress();session.connect(id,secret);
+    }
+    private void showProgress(){
+        Dialog dialog=new Dialog(this);progressDialog=dialog;LinearLayout card=column();ui.card(card,24);card.setGravity(Gravity.CENTER_HORIZONTAL);LinearLayout body=column();body.setGravity(Gravity.CENTER);body.setPadding(dp(26),dp(24),dp(26),dp(20));
+        ProgressBar spinner=new ProgressBar(this);spinner.setIndeterminateTintList(ColorStateList.valueOf(BLUE));body.addView(spinner,ui.size(34,34));ui.gap(body,14);TextView title=text("正在连接",20,true);title.setGravity(Gravity.CENTER);body.addView(title);ui.gap(body,6);status=text("正在连接信令服务器…",14,false);status.setGravity(Gravity.CENTER);status.setTextColor(SECONDARY);status.setMinHeight(dp(36));body.addView(status);card.addView(body,ui.size(-1,-2));ui.divider(card);card.addView(ui.action("取消连接",RED,()->end("")),ui.size(-1,46));
+        dialog.setContentView(card);dialog.setCanceledOnTouchOutside(false);dialog.setOnCancelListener(d->end(""));Window w=dialog.getWindow();if(w!=null){w.setBackgroundDrawableResource(android.R.color.transparent);w.setDimAmount(.08f);}dialog.show();if(w!=null)w.setLayout(dp(292),-2);
+    }
+    private void sessionScreen(){
+        installRoot("session",true);setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_FULL_SENSOR);video=new RemoteVideoView(this,session);video.setRelative(preferences.getBoolean("relativeMouse",true));canvas.addView(video,0,new FrameLayout.LayoutParams(-1,-1));
+        controls=new SessionControls(this,ui,new SessionControls.Actions(){
+            public void disconnect(){confirmDisconnect();}public void display(){selectDisplay();}public void clipboard(){MainActivity.this.clipboard();}
+            public void key(int code){tapKey(code);}
+            public void chord(int code,int[] modifiers){if(session==null)return;for(int modifier:modifiers)session.key(modifier,true);tapKey(code);for(int i=modifiers.length-1;i>=0;i--)session.key(modifiers[i],false);}public void shortcut(int code){MainActivity.this.shortcut(code);}public void text(String value){sendText(value);}
+            public void mute(){muted=!muted;if(session!=null)session.control(2,muted?0:1);controls.setMuted(muted);}
+            public void mouse(){boolean relative=!preferences.getBoolean("relativeMouse",true);preferences.edit().putBoolean("relativeMouse",relative).apply();video.setRelative(relative);controls.setRelative(relative);}
+            public void videoSettings(int field,int value){RemoteVideoSettings.Values old=MainActivity.this.videoSettings.selection;updateVideoSettings(new RemoteVideoSettings.Values(field==0?value:old.quality,field==1?value:old.frameRate,field==2?value:old.preference));}
+        });controls.setRelative(preferences.getBoolean("relativeMouse",true));controls.videoSettings(videoSettings);root.addView(controls,new LinearLayout.LayoutParams(-1,-1));getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
+    }
+    private void confirmDisconnect(){disconnectDialog=new AlertDialog.Builder(this).setTitle("断开远程连接？").setMessage("断开后将返回首页").setNegativeButton("取消",null).setPositiveButton("断开连接",(d,w)->end("")).show();}
+    private void end(String reason){
+        resetRemoteVersionCheck();
+        resetVideoSettings();
+        previewCapture=null;previewCopying=false;
+        if(progressDialog!=null){progressDialog.dismiss();progressDialog=null;}if(session!=null){releaseKeys();session.close();session=null;}stopSignaling();pendingPassword="";remoteClipboard="";hostPlatform="";displays=new JSONArray();ready=false;video=null;controls=null;getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);home(reason);
+    }
+    private void settings(){
+        LinearLayout content=formPage("settings","设置",()->home(""));
+        LinearLayout mouse=section(content,"鼠标控制",MobileUi.SETTINGS_CARD_RADIUS);mouse.setPadding(dp(12),dp(12),dp(12),dp(12));boolean relative=preferences.getBoolean("relativeMouse",true);
+        TextView detail=text(relative?"像触控板一样滑动光标，点击时操作当前光标位置。":"触摸位置直接对应远端屏幕位置，适合快速定位。",13,false);detail.setTextColor(SECONDARY);
+        mouse.addView(segments(new String[]{"相对位置","绝对位置"},relative?0:1,true,index->{preferences.edit().putBoolean("relativeMouse",index==0).apply();detail.setText(index==0?"像触控板一样滑动光标，点击时操作当前光标位置。":"触摸位置直接对应远端屏幕位置，适合快速定位。");}));ui.gap(mouse,10);mouse.addView(detail);
+        LinearLayout picture=section(content,"画面偏好",MobileUi.SETTINGS_CARD_RADIUS);picture.setPadding(dp(12),dp(12),dp(12),dp(12));int preference=Math.max(0,Math.min(2,preferences.getInt("videoPreference",1)));TextView preferenceDetail=text(RemoteVideoSettings.DETAILS[preference],13,false);preferenceDetail.setTextColor(SECONDARY);
+        picture.addView(segments(RemoteVideoSettings.PREFERENCES,preference,true,index->{preferences.edit().putInt("videoPreference",index).apply();preferenceDetail.setText(RemoteVideoSettings.DETAILS[index]);}));ui.gap(picture,10);picture.addView(preferenceDetail);ui.gap(content,28);
+        LinearLayout server=section(content,"",MobileUi.SETTINGS_CARD_RADIUS);LinearLayout fields=column();fields.setVisibility(View.GONE);boolean custom=!host.equals("api.crossdesk.cn")||port!=9099;
+        link(server,"服务器",custom?"自定义":"默认",()->fields.setVisibility(fields.getVisibility()==View.VISIBLE?View.GONE:View.VISIBLE));server.addView(fields);
+        LinearLayout toggleRow=row();toggleRow.setPadding(dp(16),dp(8),dp(16),dp(8));toggleRow.addView(text("使用自定义服务器",16,false),new LinearLayout.LayoutParams(0,-2,1));Switch toggle=new Switch(this);toggle.setContentDescription("使用自定义服务器");toggle.setChecked(custom);toggleRow.addView(toggle);fields.addView(toggleRow);
+        LinearLayout inputs=column();inputs.setPadding(dp(12),0,dp(12),dp(12));EditText address=field("服务器地址",InputType.TYPE_CLASS_TEXT|InputType.TYPE_TEXT_VARIATION_URI),number=field("服务器端口",InputType.TYPE_CLASS_NUMBER);address.setText(custom?host:"");number.setText(custom?String.valueOf(port):"");inputs.addView(address,ui.size(-1,48));ui.gap(inputs,8);inputs.addView(number,ui.size(-1,48));ui.gap(inputs,8);
+        inputs.addView(ui.action("完成",BLUE,()->{if(saveServer(address,number)){hideKeyboard();settings();}}));fields.addView(inputs);inputs.setVisibility(custom?View.VISIBLE:View.GONE);
+        toggle.setOnCheckedChangeListener((button,checked)->{inputs.setVisibility(checked?View.VISIBLE:View.GONE);if(!checked){host="api.crossdesk.cn";port=9099;preferences.edit().putString("host",host).putInt("port",port).apply();ensureSignaling();} });
+        backAction=()->{if(toggle.isChecked()&&!saveServer(address,number))return;hideKeyboard();home("");};
+        identitySummary=text("",12,false);identitySummary.setTextColor(SECONDARY);identitySummary.setGravity(Gravity.CENTER);identitySummary.setPadding(dp(16),dp(12),dp(16),dp(16));identitySummary.setTextIsSelectable(true);content.addView(identitySummary);renderSignaling();
+        LinearLayout privacy=section(content,"隐私",MobileUi.SETTINGS_CARD_RADIUS);link(privacy,"隐私与授权",preferences.getBoolean("networkConsent",false)?"已授权":"未授权",this::privacyPage);ui.divider(privacy);
+        LinearLayout preview=row();preview.setPadding(dp(16),dp(10),dp(16),dp(10));preview.addView(text("保存远程画面预览",16,false),new LinearLayout.LayoutParams(0,-2,1));previewSwitch=new Switch(this);previewSwitch.setContentDescription("保存远程画面预览");preview.addView(previewSwitch);privacy.addView(preview);
+        previewSwitch.setOnCheckedChangeListener((button,checked)->{if(updatingPreviewSwitch)return;if(checked){renderPreviews();confirmPreviewSaving();}else previews.setEnabled(false);});
+        ui.divider(privacy);clearPreviewsButton=ui.action("清除预览图",RED,this::confirmClearPreviews);clearPreviewsButton.setGravity(Gravity.START|Gravity.CENTER_VERTICAL);clearPreviewsButton.setTypeface(Typeface.DEFAULT);clearPreviewsButton.setPadding(dp(16),0,dp(16),0);privacy.addView(clearPreviewsButton,ui.size(-1,48));
+        previewCleanupError=text("",12,false);previewCleanupError.setTextColor(RED);previewCleanupError.setPadding(dp(16),dp(8),dp(16),dp(12));privacy.addView(previewCleanupError);renderPreviews();
+        footer(content,"画面预览默认关闭。开启后，从下一次连接起保存一张远程画面到本机，显示在最近连接中，不上传且不纳入设备备份。关闭开关会清除已有预览；连接记录和密码不受影响。");LinearLayout about=section(content,"",MobileUi.SETTINGS_CARD_RADIUS);link(about,"关于","",this::about);
+    }
+    private void confirmPreviewSaving(){
+        previewDialog=new AlertDialog.Builder(this).setTitle("保存远程画面预览？")
+            .setMessage("预览可能包含远程电脑上的个人或工作信息。开启后，每次连接会自动将一张画面保存在本机并显示在最近连接中。你可以随时关闭并清除。")
+            .setNegativeButton("取消",null).setPositiveButton("开启保存",(d,w)->previews.setEnabled(true)).show();
+        previewDialog.setOnDismissListener(d->{previewDialog=null;renderPreviews();});
+    }
+    private void confirmClearPreviews(){
+        previewDialog=new AlertDialog.Builder(this).setTitle("清除预览图？")
+            .setMessage("将删除本机保存的所有远程预览图，保留连接记录和密码。"+(previews.enabled()?"后续连接仍会保存新的预览图。":""))
+            .setNegativeButton("取消",null).setPositiveButton("清除",(d,w)->previews.clear()).show();
+        previewDialog.setOnDismissListener(d->previewDialog=null);
+    }
+    private void renderPreviews(){
+        if(previews==null)return;
+        if(!previews.enabled()||previews.cleaning)previewCapture=null;
+        if(previewSwitch!=null){updatingPreviewSwitch=true;previewSwitch.setChecked(previews.enabled());previewSwitch.setEnabled(preferences.getBoolean("networkConsent",false)&&!previews.cleaning);updatingPreviewSwitch=false;}
+        if(clearPreviewsButton!=null){clearPreviewsButton.setText(previews.cleaning?"正在清除…":"清除预览图");clearPreviewsButton.setEnabled(!previews.cleaning);}
+        if(previewCleanupError!=null){previewCleanupError.setText(previews.cleanupError);previewCleanupError.setVisibility(previews.cleanupError.isEmpty()?View.GONE:View.VISIBLE);}
+        for(Runnable card:previewCards)card.run();
+    }
+    private void capturePreviewIfNeeded(){
+        if(!ready||video==null||previewCapture==null||previewCopying||!previews.current(previewCapture))return;
+        if(!history.contains(serverKey(),connectedRemote)){previewCapture=null;return;}
+        RemotePreviewStore.Capture capture=previewCapture;NativeSession source=session;previewCopying=true;
+        video.capturePreview(bitmap->{
+            if(session!=source||previewCapture!=capture||!previews.current(capture)){if(bitmap!=null)bitmap.recycle();return;}
+            previewCopying=false;
+            if(bitmap!=null){previewCapture=null;previews.save(capture,bitmap);}
+            else if(++previewAttempts>=3)previewCapture=null;
+        });
+    }
+    private View segments(String[] titles,int selected,boolean enabled,java.util.function.IntConsumer changed){
+        return new SegmentedControl(ui,titles,selected,enabled,changed);
+    }
+    private boolean saveServer(EditText address,EditText number){
+        String name=address.getText().toString().trim();int value;try{value=Integer.parseInt(number.getText().toString());}catch(NumberFormatException e){number.setError("请输入 1–65535 范围内的端口");return false;}
+        if(name.length()>253||!name.matches("[A-Za-z0-9.-]+")||name.startsWith(".")||name.endsWith(".")){address.setError("填写主机名或 IPv4 地址，不含协议和路径");return false;}if(value<1||value>65535){number.setError("端口范围为 1–65535");return false;}host=name;port=value;preferences.edit().putString("host",host).putInt("port",port).apply();ensureSignaling();return true;
+    }
+    private void announcements(){
+        installRoot("announcements",false);LinearLayout bar=navigation("通知公告",()->home(""));
+        bar.removeViewAt(bar.getChildCount()-1);announcementRefresh=ui.iconButton("refresh","刷新公告",announcementInbox::refresh);bar.addView(announcementRefresh,ui.size(44,44));
+        announcementView=new AnnouncementView(ui,announcementInbox,null,this::announcementDetail,this::connectAnnouncements);
+        root.addView(announcementView,new LinearLayout.LayoutParams(-1,0,1));announcementInbox.refresh();renderAnnouncements();
+    }
+    private void announcementDetail(AnnouncementInbox.Item item){
+        installRoot("announcement-detail",false);navigation("公告详情",this::announcements);
+        announcementView=new AnnouncementView(ui,announcementInbox,item,this::announcementDetail,this::connectAnnouncements);
+        root.addView(announcementView,new LinearLayout.LayoutParams(-1,0,1));announcementInbox.markRead(item);
+    }
+    private void connectAnnouncements(){
+        if(!preferences.getBoolean("networkConsent",false))consent(()->{ensureSignaling();renderAnnouncements();});
+        else{stopSignaling();ensureSignaling();}
+    }
+    private void renderAnnouncements(){
+        if(announcementBadge!=null){int unread=announcementInbox.unread;announcementBadge.setText(unread>99?"99+":String.valueOf(unread));announcementBadge.setVisibility(unread>0?View.VISIBLE:View.GONE);
+            if(android.os.Build.VERSION.SDK_INT>=30)((View)announcementBadge.getParent()).setStateDescription(unread>0?unread+" 条未读":"无未读公告");}
+        if(announcementRefresh!=null){boolean enabled=announcementInbox.isConnected()&&!announcementInbox.loading;announcementRefresh.setEnabled(enabled);announcementRefresh.setAlpha(enabled?1:.4f);}
+        if(announcementView!=null)announcementView.render();
+    }
+    @Override public void announcement(JSONObject message){
+        if(!preferences.getBoolean("networkConsent",false)||signalState!=1)return;
+        if("announcements_changed".equals(message.optString("type")))announcementInbox.refresh();else announcementInbox.receive(message);
+    }
+    @Override public void announcementFailed(String requestId){announcementInbox.failed(requestId);}
+    private void privacyPage(){
+        LinearLayout content=formPage("privacy","隐私与授权",this::settings);LinearLayout card=section(content,"");boolean consent=preferences.getBoolean("networkConsent",false);link(card,"授权状态",consent?"已授权":"未授权",()->{});ui.divider(card);link(card,"隐私政策","",this::privacyPolicyPage);
+        footer(content,"设备身份及选择保存的访问密码使用 Android Keystore 加密。连接记录仅保存在本机，不纳入设备备份。剪贴板内容在结束会话时清除。离开应用会结束当前会话。");
+        if(consent)content.addView(ui.action("撤回联网授权",RED,()->new AlertDialog.Builder(this).setTitle("撤回联网授权？").setMessage("撤回后将停止远程连接、关闭画面预览保存并清除已有预览。连接记录和密码会保留，重新连接前需再次授权。").setNegativeButton("取消",null).setPositiveButton("撤回",(d,w)->{preferences.edit().putBoolean("networkConsent",false).apply();previews.setEnabled(false);stopSignaling();announcementInbox.reset();privacyPage();}).show()));else content.addView(ui.primary("阅读并授权",()->consent(this::privacyPage)));
+    }
+    private void privacyPolicyPage(){
+        installRoot("privacy-policy",false);navigation("隐私政策",this::privacyPage);
+        root.addView(new PrivacyPolicyDocument(this).view(ui),new LinearLayout.LayoutParams(-1,0,1));
+    }
+    private void about(){
+        if(aboutPages==null)aboutPages=new AboutPages(this,ui,this::settings);aboutPages.show();
+    }
+    private void sendText(String value){if(session==null)return;if(value.length()>2048){toast("单次最多 2048 个字符");return;}for(char ch:value.toCharArray())if(KeyMap.ascii(ch)==0){toast("中文等文本请通过剪贴板发送，再点击粘贴");return;}for(char ch:value.toCharArray()){int code=KeyMap.ascii(ch);boolean shift=(code&0x100)!=0;if(shift)session.key(0x10,true);tapKey(code&0xFF);if(shift)session.key(0x10,false);}}
+    private void tapKey(int code){if(session!=null){session.key(code,true);session.key(code,false);}}
+    private void shortcut(int code){if(session!=null){int modifier=hostPlatform.equals("macos")?0x5B:0x11;session.key(modifier,true);tapKey(code);session.key(modifier,false);}}
+    private void selectDisplay(){
+        if(!ready)return;int count=Math.min(displays.length(),8);if(count==0){toast("等待远端屏幕信息");return;}String[] labels=new String[count];for(int i=0;i<count;i++){JSONObject display=displays.optJSONObject(i);labels[i]=(i+1)+" · "+(display==null?"显示器":display.optString("name","显示器"));}new AlertDialog.Builder(this).setTitle("显示器").setItems(labels,(d,w)->{if(session!=null){if(w!=selectedDisplay&&video!=null)video.resetViewport();selectedDisplay=w;session.control(4,w);if(controls!=null)controls.resetVideoStatistics();}}).show();
+    }
+    private void clipboard(){
+        if(!ready)return;
+        EditText input=field("要发送到远端的文本",InputType.TYPE_CLASS_TEXT|InputType.TYPE_TEXT_FLAG_MULTI_LINE);input.setSingleLine(false);input.setMinLines(3);
+        new AlertDialog.Builder(this).setTitle("剪贴板").setView(input)
+                .setMessage("发送后，在远程键盘中点击“粘贴”。接收的远端文本可手动复制到本机。")
+                .setNegativeButton("关闭",null).setNeutralButton("复制远端文本",(d,w)->{
+                    if(!remoteClipboard.isEmpty())((ClipboardManager)getSystemService(CLIPBOARD_SERVICE)).setPrimaryClip(ClipData.newPlainText("CrossDesk",remoteClipboard));
+                }).setPositiveButton("发送文本",(d,w)->{
+                    String value=input.getText().toString();
+                    if(value.getBytes(java.nio.charset.StandardCharsets.UTF_8).length>128*1024){Toast.makeText(this,"文本超过 128 KB",Toast.LENGTH_SHORT).show();return;}
+                    if(session!=null)session.clipboard(value);
+                }).show();
+    }
+    void licenseDocument(String title,String value,Runnable back){
+        installRoot("document:"+title,false);navigation(title,back);
+        // Bound each selectable accessibility node while keeping every character of long notices.
+        java.util.List<String> chunks=new java.util.ArrayList<>();
+        for(int start=0;start<value.length();){int end=Math.min(start+4000,value.length());if(end<value.length()){int newline=value.lastIndexOf('\n',end-1);if(newline>start)end=newline+1;else if(Character.isHighSurrogate(value.charAt(end-1)))end--;}chunks.add(value.substring(start,end));start=end;}
+        ListView paragraphs=new ListView(this);paragraphs.setBackgroundColor(Color.WHITE);paragraphs.setDivider(null);paragraphs.setClipToPadding(false);paragraphs.setPadding(0,dp(8),0,dp(8));
+        paragraphs.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,chunks){
+            @Override public View getView(int position,View reuse,ViewGroup parent){
+                TextView item=(TextView)super.getView(position,reuse,parent);item.setTextColor(INK);item.setTextSize(16);item.setAutoLinkMask(android.text.util.Linkify.WEB_URLS);item.setText(getItem(position));item.setTextIsSelectable(true);item.setLinksClickable(true);item.setLinkTextColor(BLUE);item.setPadding(dp(16),dp(8),dp(16),dp(8));return item;
+            }
+        });root.addView(paragraphs,new LinearLayout.LayoutParams(-1,0,1));
+    }
+    private void ensureSignaling(){
+        if(!foreground||!preferences.getBoolean("networkConsent",false))return;
+        if(signaling!=null&&!signaling.isClosed()&&signalingServer.equals(serverKey()))return;
+        if(!announcementServer.equals(serverKey())){announcementInbox.reset();announcementServer=serverKey();}
+        stopSignaling();signalState=0;signalError="";signalingServer=serverKey();
+        signaling=new NativeSession(this,host,port,"","",this);
+        renderSignaling();signaling.start();
+    }
+    private void stopSignaling(){
+        mainHandler.removeCallbacks(presenceTick);recentPresence.setConnected(false,android.os.SystemClock.elapsedRealtime());
+        announcementInbox.setConnected(false);
+        if(signaling!=null)signaling.close();
+        signaling=null;signalingServer="";localIdentity="";signalState=-1;signalError="";renderSignaling();
+    }
+    private void renderSignaling(){
+        boolean consent=preferences.getBoolean("networkConsent",false);
+        boolean connected=consent&&signalError.isEmpty()&&signalState==1;
+        String label;int tint,background;
+        if(!consent){label="等待隐私授权";tint=0xFFB76A00;background=0xFFFFEBD2;}
+        else if(!signalError.isEmpty()){label=signalError.contains("TLS")?"证书校验失败 · 点击重试":"连接失败 · 点击重试";tint=RED;background=0xFFFFE8E6;}
+        else if(connected){label="已连接服务器";tint=GREEN;background=0xFFE5F4E8;}
+        else{label=signalState==0?"正在连接服务器…":signalState==4?"正在重连服务器…":"未连接服务器 · 点击重试";tint=0xFFB76A00;background=0xFFFFEBD2;}
+        if(signalBadge!=null){
+            android.graphics.drawable.Drawable icon=connected?getDrawable(R.drawable.ic_check_circle):null;
+            if(icon!=null){int size=dp(14);icon.setBounds(0,0,size,size);}
+            signalBadge.setCompoundDrawablesRelative(icon,null,null,null);signalBadge.setCompoundDrawablePadding(dp(6));
+            signalBadge.setText(label);signalBadge.setTextColor(tint);signalBadge.setBackground(ui.background(background,20));signalBadge.setContentDescription(signalError.isEmpty()?label:signalError+"，点击重试");
+        }
+        if(identitySummary!=null)identitySummary.setText(!consent?"完成隐私授权后登记本机身份":!localIdentity.isEmpty()?"本机 ID  "+localIdentity:!signalError.isEmpty()?signalError:"正在获取本机 ID…");
+    }
+    @Override public void signaling(int state,String deviceId){
+        signalState=state;localIdentity=deviceId;signalError="";renderSignaling();
+        long now=android.os.SystemClock.elapsedRealtime();recentPresence.watch(history.list(serverKey()),now);
+        recentPresence.setConnected(foreground&&preferences.getBoolean("networkConsent",false)&&state==1&&!deviceId.isEmpty(),now);
+        mainHandler.removeCallbacks(presenceTick);if(recentPresence.isConnected())mainHandler.postDelayed(presenceTick,1000);
+        if(preferences.getBoolean("networkConsent",false)){announcementInbox.configure(host,port,deviceId);announcementInbox.setConnected(state==1);}
+    }
+    @Override public void presence(JSONObject message){recentPresence.receive(message,android.os.SystemClock.elapsedRealtime());}
+    @Override public void status(String value){if(session!=null&&status!=null)status.setText(value);}
+    @Override public void connected(){
+        // Transport readiness can be reported again after ICE changes its selected path.
+        // The first success consumes pendingPassword; a duplicate must not save it again.
+        if(session==null||ready)return;ready=true;if(progressDialog!=null){progressDialog.dismiss();progressDialog=null;}
+        try{history.save(serverKey(),connectedRemote,connectedRemote,hostPlatform,rememberPassword,pendingPassword);}catch(Exception error){toast("密码保存失败，本次连接仍可使用");}pendingPassword="";sessionScreen();
+        if(videoSettings.supported&&videoSettings.requestId==0)updateVideoSettings(videoSettings.selection);
+        if(foreground&&preferences.getBoolean("networkConsent",false))remoteVersionCheck.connected();
+    }
+    @Override public void ended(String reason){
+        if(session!=null){end(reason);return;}
+        stopSignaling();signalError=reason;renderSignaling();
+    }
+    @Override public void passwordRejected(){
+        if(session==null)return;
+        String id=connectedRemote;boolean remember=rememberPassword;
+        end("");
+        // Let the user replace an expired credential; never retry it automatically.
+        if(foreground)passwordSheet(id,"访问密码错误，请重新输入",remember);
+    }
+    private void cancelVideoSettingsTimeout(){if(videoSettingsTimeout!=null)mainHandler.removeCallbacks(videoSettingsTimeout);videoSettingsTimeout=null;}
+    private void showRemoteUpdate(){
+        if(!ready||session==null||!foreground||isFinishing()||!preferences.getBoolean("networkConsent",false))return;
+        remoteUpdateDialog=new AlertDialog.Builder(this).setTitle("升级提示").setMessage(RemoteVersionCheck.NOTICE).setPositiveButton("知道了",null).create();
+        remoteUpdateDialog.setOnDismissListener(dialog->remoteUpdateDialog=null);
+        remoteUpdateDialog.setCanceledOnTouchOutside(false);
+        remoteUpdateDialog.show();
+    }
+    private void resetRemoteVersionCheck(){
+        remoteVersionCheck.reset();
+        if(remoteUpdateDialog!=null){remoteUpdateDialog.dismiss();remoteUpdateDialog=null;}
+    }
+    private void resetVideoSettings(){
+        cancelVideoSettingsTimeout();
+        android.util.DisplayMetrics metrics=getResources().getDisplayMetrics();
+        videoSettings=new RemoteVideoSettings(preferences.getInt("videoPreference",1),Math.max(metrics.widthPixels,metrics.heightPixels));
+    }
+    private void updateVideoSettings(RemoteVideoSettings.Values value){
+        if(!ready||session==null||!preferences.getBoolean("networkConsent",false))return;
+        long request=videoSettings.begin(value);if(request<0)return;
+        cancelVideoSettingsTimeout();if(controls!=null)controls.videoSettings(videoSettings);session.videoSettings(value,request);
+        videoSettingsTimeout=()->{videoSettings.expire(request);if(controls!=null)controls.videoSettings(videoSettings);};mainHandler.postDelayed(videoSettingsTimeout,5000);
+    }
+    @Override public void data(JSONObject message){
+        if(session==null)return;
+        if(message.optInt("type",-1)==12){if(!ready)return;videoSettings.receive(message);if(!videoSettings.pending)cancelVideoSettingsTimeout();if(controls!=null)controls.videoSettings(videoSettings);return;}
+        JSONObject info=message.optJSONObject("host_info");
+        if(info!=null){
+            hostPlatform=info.optString("platform","");JSONArray list=info.optJSONArray("displays");if(list!=null)displays=list;history.metadata(serverKey(),connectedRemote,info.optString("host_name",connectedRemote),hostPlatform);
+            boolean wasSupported=videoSettings.supported;videoSettings.setSupported(info.optBoolean("supports_video_settings",false));
+            if(!videoSettings.supported)cancelVideoSettingsTimeout();
+            if(controls!=null)controls.videoSettings(videoSettings);
+            if(videoSettings.supported&&!wasSupported)updateVideoSettings(videoSettings.selection);
+            if(foreground&&preferences.getBoolean("networkConsent",false))remoteVersionCheck.hostInfo(info);
+        }
+    }
+    @Override public void videoSize(int width,int height){if(video!=null)video.videoSize(width,height);if(controls!=null)controls.videoSize(width,height);}
+    @Override public void clipboard(String value){remoteClipboard=value;}
+    @Override public void statistics(RemoteNetworkStatistics.Snapshot value){if(controls!=null)controls.statistics(value);if(value.fps>0)capturePreviewIfNeeded();}
+    @Override public boolean dispatchKeyEvent(KeyEvent event){
+        if(ready&&session!=null&&hasWindowFocus()&&!(getCurrentFocus() instanceof EditText)&&event.getKeyCode()!=KeyEvent.KEYCODE_BACK){int code=KeyMap.windowsCode(event.getKeyCode());if(code!=0){boolean down=event.getAction()==KeyEvent.ACTION_DOWN;if(down)pressed.add(code);else pressed.remove(code);session.key(code,down);return true;}}return super.dispatchKeyEvent(event);
+    }
+    private void releaseKeys(){if(session!=null)for(int code:pressed)session.key(code,false);pressed.clear();}
+    private void navigateBack(){if(backAction==null)return;navigatingBack=true;try{backAction.run();}finally{navigatingBack=false;}}
+    private void back(){pageHost.finish();if(session!=null){if(ready)confirmDisconnect();else end("");}else if(backAction!=null)navigateBack();else finish();}
+    @Override public void onWindowFocusChanged(boolean focus){super.onWindowFocusChanged(focus);if(!focus)releaseKeys();else applySystemBars(ready);}
+    @android.annotation.SuppressLint("GestureBackNavigation") @Override public void onBackPressed(){back();}
+    @Override public void onConfigurationChanged(Configuration config){super.onConfigurationChanged(config);if(controls!=null)controls.post(controls::constrainPanels);}
+    // onStart marks a new visit; focus/resume callbacks must not reopen a refused notice.
+    @Override protected void onStart(){super.onStart();foreground=true;if(!preferences.getBoolean("networkConsent",false))consent(this::renderSignaling);ensureSignaling();}
+    @Override protected void onStop(){foreground=false;if(privacyDialog!=null)privacyDialog.dismiss();pageHost.finish();if(session!=null)end(isFinishing()?"":"应用已进入后台，会话已结束");stopSignaling();super.onStop();}
+    @Override protected void onDestroy(){pageHost.finish();resetRemoteVersionCheck();cancelVideoSettingsTimeout();previews.removeListener(previewChanged);if(privacyDialog!=null)privacyDialog.dismiss();if(previewDialog!=null)previewDialog.dismiss();announcementInbox.close();if(disconnectDialog!=null)disconnectDialog.dismiss();if(passwordDialog!=null)passwordDialog.dismiss();if(progressDialog!=null)progressDialog.dismiss();if(session!=null)session.close();stopSignaling();super.onDestroy();}
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/MobileUi.java

@@ -0,0 +1,123 @@
+package cn.crossdesk.mobile;
+
+import android.content.Context;
+import android.graphics.*;
+import android.graphics.drawable.Drawable;
+import android.graphics.drawable.GradientDrawable;
+import android.view.*;
+import android.widget.*;
+
+/** Shared visual tokens matching the SwiftUI mobile screens. Values are in dp/sp. */
+final class MobileUi {
+    static final int BACKGROUND=0xFFF2F2F7, INK=0xFF1C1C1E, SECONDARY=0xFF737378,
+            LINE=0xFFE2E2E7, BLUE=0xFF2E7ADB, RED=0xFFFF3B30, GREEN=0xFF248A3D;
+    // Match the iOS 26 Form sections and segmented Picker dimensions.
+    static final int SETTINGS_CARD_RADIUS=26, SEGMENT_HEIGHT=32, SEGMENT_INSET=2;
+    final Context context;
+    MobileUi(Context context) { this.context=context; }
+    int dp(float value) { return Math.round(value*context.getResources().getDisplayMetrics().density); }
+    GradientDrawable background(int color,int radius) {
+        GradientDrawable shape=new GradientDrawable();shape.setColor(color);shape.setCornerRadius(dp(radius));return shape;
+    }
+    void card(View view,int radius) { GradientDrawable shape=background(Color.WHITE,radius);shape.setStroke(dp(.5f),LINE);view.setBackground(shape);view.setClipToOutline(true); }
+    FrameLayout shadowCard(View content,int radius) {
+        card(content,radius);
+        FrameLayout wrapper=new FrameLayout(context);
+        wrapper.setClipChildren(false);wrapper.setClipToPadding(false);
+        wrapper.setBackground(new CardShadow(dp(radius),dp(14),dp(5)));
+        wrapper.addView(content,new FrameLayout.LayoutParams(-1,-2));
+        return wrapper;
+    }
+    LinearLayout column() { LinearLayout v=new LinearLayout(context);v.setOrientation(LinearLayout.VERTICAL);return v; }
+    LinearLayout row() { LinearLayout v=new LinearLayout(context);v.setGravity(Gravity.CENTER_VERTICAL);return v; }
+    TextView text(String title,int size,boolean bold) {
+        TextView v=new TextView(context);v.setText(title);v.setTextSize(size);v.setTextColor(INK);v.setIncludeFontPadding(false);
+        if(bold)v.setTypeface(null,Typeface.BOLD);return v;
+    }
+    TextView action(String title,int color,Runnable click) {
+        TextView v=text(title,16,true);v.setGravity(Gravity.CENTER);v.setTextColor(color);
+        v.setMinHeight(dp(48));v.setClickable(true);v.setFocusable(true);v.setOnClickListener(ignored->click.run());
+        v.setAccessibilityDelegate(new View.AccessibilityDelegate(){@Override public void onInitializeAccessibilityNodeInfo(View host,android.view.accessibility.AccessibilityNodeInfo info){super.onInitializeAccessibilityNodeInfo(host,info);info.setClassName("android.widget.Button");}});
+        return v;
+    }
+    TextView primary(String title,Runnable click) {
+        TextView v=action(title,Color.WHITE,click);
+        GradientDrawable gradient=new GradientDrawable(GradientDrawable.Orientation.TL_BR,new int[]{BLUE,0xFF1F61C7});gradient.setCornerRadius(dp(12));v.setBackground(gradient);return v;
+    }
+    View iconButton(String icon,String label,Runnable click) {
+        FrameLayout box=new FrameLayout(context);box.setBackground(background(Color.WHITE,10));
+        Icon glyph=new Icon(context,icon,INK);FrameLayout.LayoutParams p=new FrameLayout.LayoutParams(dp(22),dp(22),Gravity.CENTER);box.addView(glyph,p);
+        box.setContentDescription(label);box.setClickable(true);box.setFocusable(true);box.setOnClickListener(v->click.run());return box;
+    }
+    View icon(String name,int color) { return new Icon(context,name,color); }
+    void gap(LinearLayout parent,int height){parent.addView(new View(context),new LinearLayout.LayoutParams(1,dp(height)));}
+    void divider(LinearLayout parent){View line=new View(context);line.setBackgroundColor(LINE);parent.addView(line,new LinearLayout.LayoutParams(-1,dp(.5f)));}
+    LinearLayout.LayoutParams size(int width,int height){return new LinearLayout.LayoutParams(width<0?width:dp(width),height<0?height:dp(height));}
+    /** The iOS connection panel uses black at 5.5%, blur 14, y 5, rather than elevation. */
+    private static final class CardShadow extends Drawable {
+        private final Paint bitmapPaint=new Paint(Paint.ANTI_ALIAS_FLAG|Paint.FILTER_BITMAP_FLAG);
+        private final float cornerRadius,blurRadius,offsetY;
+        private final int inset;
+        private Bitmap bitmap;
+        CardShadow(float cornerRadius,float blurRadius,float offsetY) {
+            this.cornerRadius=cornerRadius;this.blurRadius=blurRadius;this.offsetY=offsetY;
+            inset=(int)Math.ceil(blurRadius*2+Math.abs(offsetY));
+        }
+        @Override protected void onBoundsChange(Rect bounds) {
+            bitmap=null;
+            if(bounds.isEmpty())return;
+            // Render once on a bitmap canvas: shadow layers need software rendering on API 26.
+            bitmap=Bitmap.createBitmap(bounds.width()+inset*2,bounds.height()+inset*2,Bitmap.Config.ARGB_8888);
+            bitmap.setDensity(Bitmap.DENSITY_NONE);
+            Paint shadowPaint=new Paint(Paint.ANTI_ALIAS_FLAG);
+            shadowPaint.setColor(Color.WHITE);
+            shadowPaint.setShadowLayer(blurRadius,0,offsetY,Color.argb(Math.round(255*.055f),0,0,0));
+            new Canvas(bitmap).drawRoundRect(inset,inset,inset+bounds.width(),inset+bounds.height(),cornerRadius,cornerRadius,shadowPaint);
+        }
+        @Override public void draw(Canvas canvas) {
+            if(bitmap!=null)canvas.drawBitmap(bitmap,getBounds().left-inset,getBounds().top-inset,bitmapPaint);
+        }
+        @Override public void setAlpha(int alpha) { bitmapPaint.setAlpha(alpha);invalidateSelf(); }
+        @Override public void setColorFilter(ColorFilter filter) { bitmapPaint.setColorFilter(filter);invalidateSelf(); }
+        @Override public int getOpacity() { return PixelFormat.TRANSLUCENT; }
+    }
+    @android.annotation.SuppressLint("ViewConstructor") // Programmatic icon primitive, not inflated from XML.
+    static final class Icon extends View {
+        private final Paint paint=new Paint(Paint.ANTI_ALIAS_FLAG); private final String name;
+        Icon(Context context,String name,int color){super(context);this.name=name;paint.setColor(color);setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_NO);}
+        @Override protected void onDraw(Canvas c){
+            c.save();c.scale(getWidth()/24f,getHeight()/24f);paint.setStyle(Paint.Style.STROKE);paint.setStrokeWidth(1.7f);paint.setStrokeCap(Paint.Cap.ROUND);paint.setStrokeJoin(Paint.Join.ROUND);
+            switch(name){
+                case "settings":
+                    c.drawCircle(12,12,7,paint);c.drawCircle(12,12,3,paint);
+                    for(int i=0;i<8;i++){c.save();c.rotate(i*45,12,12);c.drawLine(12,2,12,5,paint);c.restore();}break;
+                case "bell":
+                    path(c,5,17,6,14,6,9,7,6,10,4,14,4,17,6,18,9,18,14,19,17,5,17);c.drawArc(9,17,15,22,0,180,false,paint);c.drawLine(12,2,12,4,paint);break;
+                case "history":
+                    c.drawArc(4,4,21,21,215,315,false,paint);path(c,3,4,3,10,9,10);path(c,12,7,12,13,16,15);break;
+                case "back":path(c,15,4,7,12,15,20);break;
+                case "refresh":c.drawArc(4,4,20,20,35,310,false,paint);path(c,20,3,20,9,14,9);break;
+                case "close":path(c,6,6,18,18);path(c,18,6,6,18);break;
+                case "arrow":path(c,4,12,20,12);path(c,14,6,20,12,14,18);break;
+                case "keyboard":
+                    c.drawRoundRect(2,5,22,19,3,3,paint);for(int y=9;y<=12;y+=3)for(int x=6;x<=18;x+=4)c.drawPoint(x,y,paint);c.drawLine(7,16,17,16,paint);break;
+                case "display":c.drawRoundRect(2,3,22,17,2,2,paint);path(c,12,17,12,21);path(c,7,21,17,21);break;
+                case "sliders":
+                    for(int y=6;y<=18;y+=6){c.drawLine(3,y,21,y,paint);c.drawCircle(y==12?15:8,y,2,paint);}break;
+                case "audio":path(c,3,9,7,9,12,4,12,20,7,15,3,15,3,9);c.drawArc(10,5,21,19,-65,130,false,paint);break;
+                case "mouse":c.drawRoundRect(5,2,19,22,7,7,paint);path(c,12,3,12,10);break;
+                case "folder":path(c,2,19,2,5,9,5,12,8,22,8,22,19,2,19);break;
+                case "chart":path(c,3,3,3,21,22,21);path(c,7,17,7,13);path(c,12,17,12,8);path(c,18,17,18,4);break;
+                case "lock":c.drawRoundRect(5,10,19,22,2,2,paint);c.drawArc(8,2,16,15,180,180,false,paint);c.drawPoint(12,16,paint);break;
+                case "key":
+                    paint.setStyle(Paint.Style.FILL);c.drawCircle(7,8,5,paint);paint.setStyle(Paint.Style.STROKE);paint.setStrokeWidth(4);path(c,10,11,19,20);path(c,15,16,18,13);path(c,18,19,21,16);
+                    paint.setStyle(Paint.Style.FILL);int keyColor=paint.getColor();paint.setColor(Color.WHITE);c.drawCircle(6,7,1.5f,paint);paint.setColor(keyColor);break;
+                case "unlock":c.drawRoundRect(5,10,19,22,2,2,paint);c.drawArc(8,2,16,15,180,150,false,paint);c.drawPoint(12,16,paint);break;
+                case "clipboard":c.drawRoundRect(4,4,20,22,2,2,paint);c.drawRoundRect(8,2,16,7,2,2,paint);break;
+                case "eye":path(c,2,12,6,7,12,5,18,7,22,12,18,17,12,19,6,17,2,12);c.drawCircle(12,12,3,paint);break;
+                default:c.drawCircle(12,12,9,paint);path(c,12,10,12,17);c.drawPoint(12,6,paint);
+            }c.restore();
+        }
+        private void path(Canvas c,float... values){Path p=new Path();p.moveTo(values[0],values[1]);for(int i=2;i<values.length;i+=2)p.lineTo(values[i],values[i+1]);c.drawPath(p,paint);}
+    }
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/NativeSession.java

@@ -0,0 +1,260 @@
+package cn.crossdesk.mobile;
+
+import android.content.Context;
+import android.os.Handler;
+import android.os.Looper;
+import android.util.Base64;
+import android.view.Surface;
+import org.json.JSONArray;
+import org.json.JSONObject;
+import java.io.File;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.security.KeyStore;
+import java.security.cert.X509Certificate;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import javax.net.ssl.TrustManager;
+import javax.net.ssl.TrustManagerFactory;
+import javax.net.ssl.X509TrustManager;
+
+final class NativeSession implements AutoCloseable {
+    static { System.loadLibrary("crossdesk_android"); }
+    interface Listener {
+        void status(String message);
+        void connected();
+        void ended(String reason);
+        void data(JSONObject message);
+        void videoSize(int width, int height);
+        void clipboard(String text);
+        void statistics(RemoteNetworkStatistics.Snapshot value);
+        default void signaling(int state, String deviceId) { }
+        default void presence(JSONObject message) { }
+        default void announcement(JSONObject message) { }
+        default void announcementFailed(String requestId) { }
+        default void passwordRejected() { ended("远端密码错误"); }
+    }
+    // Serializes all peer creation/API calls/destruction, including across activities.
+    private static final ExecutorService RTC = Executors.newSingleThreadExecutor(r -> new Thread(r, "CrossDesk RTC"));
+    private final Handler main = new Handler(Looper.getMainLooper());
+    private final Context context;
+    private final Listener listener;
+    private final SecretStore secrets;
+    private final String host, scope;
+    private volatile String remote;
+    private String password, identity = "";
+    private final int port;
+    private long handle;
+    private boolean signalReady, joining, connected, started;
+    private int signalState;
+    private volatile long signalGeneration;
+    private boolean presenceRequested;
+    private volatile boolean closed;
+    private Surface surface;
+    private volatile AudioPlayer audio;
+    private final RemoteNetworkStatistics networkStatistics=new RemoteNetworkStatistics();
+    private final Runnable statisticsTick=new Runnable(){public void run(){
+        if(closed)return;
+        listener.statistics(networkStatistics.snapshot(RemoteNetworkStatistics.now()));
+        if(!closed)main.postDelayed(this,1000);
+    }};
+    private final Runnable timeout = () -> fail(remote.isEmpty()
+            ? "服务器连接超时，请检查服务器地址和网络"
+            : "连接超时，请检查设备 ID、服务器及远端在线状态");
+
+    NativeSession(Context context, String host, int port, String remote, String password, Listener listener) {
+        this.context = context.getApplicationContext(); this.listener = listener;
+        this.host = host; this.port = port; this.remote = remote; this.password = password;
+        scope = host.toLowerCase(java.util.Locale.ROOT) + ":" + port;
+        secrets = new SecretStore(this.context);
+    }
+    void start() {
+        if (started || closed) return;
+        started = true;
+        main.postDelayed(timeout, 40000);
+        execute(() -> {
+            try {
+                identity = secrets.get(scope);
+                File certificates = exportTrust();
+                File logs = new File(context.getNoBackupFilesDir(), "logs");
+                if (!logs.isDirectory() && !logs.mkdirs()) throw new IllegalStateException("Log directory unavailable");
+                handle = nCreate(this, host, port, identity, logs.getAbsolutePath(), certificates.getAbsolutePath());
+                if (handle == 0) { fail("原生连接初始化失败"); return; }
+                if (surface != null && surface.isValid()) nSurface(handle, surface);
+            } catch (Exception error) { fail("安全存储或证书初始化失败，请重试或清除应用数据"); }
+        });
+    }
+    /** Promote the already registered identity peer to an outgoing desktop session. */
+    void connect(String remoteId, String secret) {
+        execute(() -> {
+            if (joining || connected) return;
+            remote = remoteId;
+            password = secret;
+            // Serialize arming with identity callbacks, which cancel the idle
+            // login timeout. Otherwise a just-completed login can cancel this
+            // outgoing connection's timeout before tryJoin runs.
+            main.removeCallbacks(timeout);
+            main.postDelayed(timeout, 40000);
+            tryJoin();
+        });
+    }
+    boolean isClosed() { return closed; }
+    private void publishSignaling() {
+        int state = signalState;
+        // Only expose the public device ID, never the identity's @password suffix.
+        String deviceId = identity.split("@", 2)[0];
+        ui(() -> listener.signaling(state, deviceId));
+    }
+    private File exportTrust() throws Exception {
+        TrustManagerFactory factory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
+        factory.init((KeyStore) null);
+        StringBuilder pem = new StringBuilder();
+        for (TrustManager manager : factory.getTrustManagers()) {
+            if (manager instanceof X509TrustManager trust) {
+                for (X509Certificate certificate : trust.getAcceptedIssuers()) {
+                    pem.append("-----BEGIN CERTIFICATE-----\n")
+                            .append(Base64.encodeToString(certificate.getEncoded(), Base64.NO_WRAP))
+                            .append("\n-----END CERTIFICATE-----\n");
+                }
+            }
+        }
+        if (pem.length() == 0) throw new IllegalStateException("Empty Android trust store");
+        File output = new File(context.getNoBackupFilesDir(), "trusted-roots.pem");
+        Files.write(output.toPath(), pem.toString().getBytes(StandardCharsets.US_ASCII));
+        return output;
+    }
+    private void execute(Runnable task) { RTC.execute(() -> { if (!closed) task.run(); }); }
+    private void ui(Runnable task) { main.post(() -> { if (!closed) task.run(); }); }
+    private void fail(String reason) { ui(() -> { listener.ended(reason); close(); }); }
+    private void tryJoin() {
+        if (handle == 0 || joining || remote.isEmpty() || !signalReady || identity.isEmpty()) return;
+        joining = true;
+        String base = identity.split("@", 2)[0];
+        if (!nConnect(handle, base, remote, password)) fail("无法发起远程连接");
+        password = "";
+    }
+    // Called on arbitrary native callback threads; borrowed payloads were copied by JNI.
+    @SuppressWarnings("unused") private void onNativeEvent(int type, byte[] bytes) {
+        execute(() -> {
+            String value = new String(bytes, StandardCharsets.UTF_8);
+            try {
+                if (type == 3) {
+                    if (value.contains("@")) {
+                        identity = value;
+                        secrets.put(scope, identity);
+                    } else if (!identity.startsWith(value + "@")) identity = value;
+                    publishSignaling(); tryJoin(); return;
+                }
+                if (type == 6) { ui(() -> listener.clipboard(value)); return; }
+                JSONObject event = new JSONObject(value);
+                if (type == 1) {
+                    int status = event.getInt("status");
+                    if (!event.getBoolean("controller")) {
+                        long generation=event.optLong("generation");
+                        if(signalGeneration!=generation){signalGeneration=generation;presenceRequested=false;}
+                        signalState = status;
+                        signalReady = status == 1;
+                        if (signalReady && remote.isEmpty()) main.removeCallbacks(timeout);
+                        publishSignaling();
+                        tryJoin();
+                    }
+                    if (status == 6) fail("服务器 TLS 证书校验失败");
+                    else if (status == 2) fail("服务器登录失败，请检查服务器地址和网络");
+                    else if (status >= 3 && connected) fail("信令连接中断，请重新连接");
+                    else if (status == 0 || status == 4) ui(() -> listener.status("正在连接信令服务器…"));
+                } else if (type == 2) {
+                    int status = event.getInt("status");
+                    if (status == 1) {
+                        if (connected) return; // Repeated transport readiness is the same desktop session.
+                        connected = true; main.removeCallbacks(timeout); nReady(handle);
+                        audio = new AudioPlayer();
+                        nControl(handle, 2, 1);
+                        ui(() -> { listener.connected(); if(!closed)statisticsTick.run(); });
+                    } else if (status == 0 || status == 2) ui(() -> listener.status("正在建立安全连接…"));
+                    else if (status == 6) ui(() -> { listener.passwordRejected(); close(); });
+                    else {
+                        String[] reasons = {"", "", "", "连接已断开", "连接失败", "远端已关闭连接",
+                                "远端密码错误", "找不到该设备 ID", "远端当前不可用"};
+                        fail(status >= 0 && status < reasons.length ? reasons[status] : "连接已结束");
+                    }
+                } else if (type == 4) ui(() -> listener.data(event));
+                else if (type == 5) {
+                    int width = event.getInt("width"), height = event.getInt("height");
+                    ui(() -> listener.videoSize(width, height));
+                } else if (type == 7) networkStatistics.receive(new RemoteNetworkStatistics.Report(event),RemoteNetworkStatistics.now());
+                else if (type == 8 && signalReady) ui(() -> listener.announcement(event));
+                else if (type == 9 && signalReady && presenceRequested) {
+                    long generation=event.optLong("generation");
+                    if(generation==signalGeneration)ui(()->{if(generation==signalGeneration)listener.presence(event);});
+                }
+            } catch (Exception error) {
+                if (type == 3) fail("设备身份保存失败，请检查安全存储");
+            }
+        });
+    }
+    @SuppressWarnings("unused") private void onNativeAudio(byte[] pcm) {
+        AudioPlayer player = audio;
+        if (!closed && player != null) player.offer(pcm);
+    }
+    @SuppressWarnings("unused") private void onNativeVideoFrame(long id,double latency,int width,int height){
+        if(!closed)networkStatistics.frame(id,latency,width,height,RemoteNetworkStatistics.now());
+    }
+    void videoSettings(RemoteVideoSettings.Values settings,long requestId){
+        if(!settings.valid()||requestId<0||requestId>0xffffffffL)return;
+        execute(()->{if(connected&&!nVideoSettings(handle,settings.quality,settings.frameRate,settings.preference,requestId))ui(()->listener.data(settings.status(requestId,false)));});
+    }
+    void announcementRequest(JSONObject request,String requestId){
+        byte[] bytes=request.toString().getBytes(StandardCharsets.UTF_8);
+        execute(()->{if(!signalReady||identity.isEmpty()||!nAnnouncementRequest(handle,bytes))ui(()->listener.announcementFailed(requestId));});
+    }
+    void presenceRequest(JSONArray ids){
+        // Own the caller's list before crossing to the serialized RTC executor.
+        String devices=ids.toString();
+        execute(()->{
+            if(!signalReady||identity.isEmpty())return;
+            try{
+                JSONObject request=new JSONObject().put("type","recent_connections_presence")
+                    .put("user_id",identity.split("@",2)[0]).put("devices",new JSONArray(devices)).put("subscribe",true);
+                if(nPresenceRequest(handle,request.toString().getBytes(StandardCharsets.UTF_8)))presenceRequested=true;
+            }catch(org.json.JSONException ignored){ }
+        });
+    }
+    void surface(Surface value) { execute(() -> { surface = value; if (handle != 0) nSurface(handle, value); }); }
+    void pointer(float x, float y, int flag, int wheel) { execute(() -> { if (connected) nPointer(handle, x, y, flag, wheel); }); }
+    void key(int code, boolean down) { execute(() -> { if (connected) nKey(handle, code, down); }); }
+    void control(int type, int value) {
+        AudioPlayer player = audio;
+        if (type == 2 && player != null) player.setEnabled(value != 0);
+        execute(() -> { if (connected){nControl(handle, type, value);if(type==4)networkStatistics.resetVideo();} });
+    }
+    void clipboard(String value) {
+        byte[] bytes = value.getBytes(StandardCharsets.UTF_8);
+        if (bytes.length == 0 || bytes.length > 128 * 1024) return;
+        execute(() -> { if (connected) nClipboard(handle, bytes); });
+    }
+    @Override public void close() {
+        if (closed) return;
+        closed = true; main.removeCallbacks(timeout);main.removeCallbacks(statisticsTick);
+        RTC.execute(() -> {
+            main.removeCallbacks(timeout);
+            if (audio != null) { audio.close(); audio = null; }
+            password = "";
+            if (handle != 0) { nDestroy(handle); handle = 0; }
+            surface = null;
+        });
+    }
+    static native boolean nValidAppVersion(String version);
+    static native boolean nHasAppUpdate(String version, byte[] releaseJson);
+    private static native long nCreate(NativeSession owner, String host, int port, String identity, String logs, String roots);
+    private static native boolean nConnect(long handle, String identity, String remote, String password);
+    private static native void nReady(long handle);
+    private static native void nPointer(long handle, float x, float y, int flag, int wheel);
+    private static native void nKey(long handle, int code, boolean down);
+    private static native void nControl(long handle, int type, int value);
+    private static native boolean nVideoSettings(long handle,int quality,int frameRate,int preference,long requestId);
+    private static native boolean nAnnouncementRequest(long handle,byte[] data);
+    private static native boolean nPresenceRequest(long handle,byte[] data);
+    private static native void nClipboard(long handle, byte[] data);
+    private static native void nSurface(long handle, Surface surface);
+    private static native void nDestroy(long handle);
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/PageHost.java

@@ -0,0 +1,95 @@
+package cn.crossdesk.mobile;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.ValueAnimator;
+import android.content.Context;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.ViewTreeObserver;
+import android.view.animation.PathInterpolator;
+import android.widget.FrameLayout;
+
+/** Retains only the current page and, during a transition, the outgoing page. */
+final class PageHost extends FrameLayout {
+    enum Motion { NONE, PUSH, POP, SESSION_IN, SESSION_OUT }
+
+    private FrameLayout current, outgoing;
+    private Motion motion=Motion.NONE;
+    private ValueAnimator animator;
+    private ViewTreeObserver pendingObserver;
+    private ViewTreeObserver.OnPreDrawListener pendingStart;
+    private int accessibility, focusability;
+    private float distance;
+    private long generation;
+
+    PageHost(Context context){super(context);setBackgroundColor(MobileUi.BACKGROUND);}
+
+    void show(FrameLayout page,Motion requested){
+        finish();
+        FrameLayout previous=current;current=page;
+        if(previous==null||requested==Motion.NONE||!ValueAnimator.areAnimatorsEnabled()||!isAttachedToWindow()){
+            removeAllViews();addView(page,new LayoutParams(-1,-1));page.requestApplyInsets();return;
+        }
+        outgoing=previous;motion=requested;
+        accessibility=page.getImportantForAccessibility();
+        focusability=page.getDescendantFocusability();
+        previous.clearFocus();previous.setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS);
+        page.setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS);
+        page.setDescendantFocusability(FOCUS_BLOCK_DESCENDANTS);
+        boolean underneath=motion==Motion.POP||motion==Motion.SESSION_IN;
+        addView(page,underneath?0:getChildCount(),new LayoutParams(-1,-1));
+        // SurfaceView pages stay opaque and unlayered. Fade the ordinary UI above them.
+        if(motion==Motion.PUSH||motion==Motion.POP){
+            previous.setLayerType(LAYER_TYPE_HARDWARE,null);page.setLayerType(LAYER_TYPE_HARDWARE,null);
+            (motion==Motion.PUSH?page:previous).setElevation(8*getResources().getDisplayMetrics().density);
+        }else (motion==Motion.SESSION_IN?previous:page).setLayerType(LAYER_TYPE_HARDWARE,null);
+        distance=getWidth()*(getLayoutDirection()==LAYOUT_DIRECTION_RTL?-1:1);
+        progress(0);page.requestApplyInsets();
+        // Wait for content and insets, so the first drawn frame already has the right position.
+        long transition=generation;
+        pendingObserver=getViewTreeObserver();
+        pendingStart=()->{
+            if(transition!=generation||outgoing==null)return true;
+            clearPendingStart();distance=getWidth()*(getLayoutDirection()==LAYOUT_DIRECTION_RTL?-1:1);progress(0);
+            ValueAnimator next=ValueAnimator.ofFloat(0,1);animator=next;
+            boolean session=motion==Motion.SESSION_IN||motion==Motion.SESSION_OUT;
+            next.setDuration(session?200:350);
+            next.setInterpolator(session?new PathInterpolator(.42f,0,.58f,1):new PathInterpolator(.25f,.1f,.25f,1));
+            next.addUpdateListener(value->{if(animator==value)progress((float)value.getAnimatedValue());});
+            next.addListener(new AnimatorListenerAdapter(){@Override public void onAnimationEnd(Animator value){if(animator==value)finish();}});
+            next.start();return true;
+        };
+        pendingObserver.addOnPreDrawListener(pendingStart);
+    }
+
+    private void progress(float value){
+        switch(motion){
+            case PUSH -> {current.setTranslationX(distance*(1-value));outgoing.setTranslationX(-distance*.3f*value);}
+            case POP -> {current.setTranslationX(-distance*.3f*(1-value));outgoing.setTranslationX(distance*value);}
+            case SESSION_IN -> outgoing.setAlpha(1-value);
+            case SESSION_OUT -> current.setAlpha(value);
+            default -> {}
+        }
+    }
+
+    void finish(){
+        generation++;
+        clearPendingStart();
+        ValueAnimator running=animator;animator=null;if(running!=null)running.cancel();
+        if(outgoing==null)return;
+        reset(outgoing);removeView(outgoing);outgoing=null;
+        reset(current);current.setImportantForAccessibility(accessibility);
+        current.setDescendantFocusability(focusability);motion=Motion.NONE;
+    }
+    private void clearPendingStart(){
+        if(pendingObserver!=null&&pendingObserver.isAlive()&&pendingStart!=null)pendingObserver.removeOnPreDrawListener(pendingStart);
+        pendingObserver=null;pendingStart=null;
+    }
+    private static void reset(View page){page.setTranslationX(0);page.setAlpha(1);page.setElevation(0);page.setLayerType(LAYER_TYPE_NONE,null);}
+    @Override public boolean onInterceptTouchEvent(MotionEvent event){return outgoing!=null||super.onInterceptTouchEvent(event);}
+    @android.annotation.SuppressLint("ClickableViewAccessibility") // A temporary input shield; the pages own all click actions.
+    @Override public boolean onTouchEvent(MotionEvent event){return outgoing!=null||super.onTouchEvent(event);}
+    @Override protected void onSizeChanged(int w,int h,int oldw,int oldh){super.onSizeChanged(w,h,oldw,oldh);if(oldw>0&&oldh>0&&(w!=oldw||h!=oldh))finish();}
+    @Override protected void onDetachedFromWindow(){finish();super.onDetachedFromWindow();}
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/PrivacyConsentDialog.java

@@ -0,0 +1,36 @@
+package cn.crossdesk.mobile;
+
+import android.app.Activity;
+import android.app.Dialog;
+import android.view.Gravity;
+import android.view.Window;
+import android.widget.CheckBox;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import static cn.crossdesk.mobile.MobileUi.*;
+
+/** Explicit agreement is required; refusal dismisses only the current visit. */
+final class PrivacyConsentDialog extends Dialog {
+    PrivacyConsentDialog(Activity activity,MobileUi ui,Runnable accepted){
+        this(activity,ui,new PrivacyPolicyDocument(activity),accepted);
+    }
+    PrivacyConsentDialog(Activity activity,MobileUi ui,PrivacyPolicyDocument policy,Runnable accepted){
+        super(activity);requestWindowFeature(Window.FEATURE_NO_TITLE);setCancelable(false);setCanceledOnTouchOutside(false);
+        LinearLayout sheet=ui.column();sheet.setBackground(ui.background(android.graphics.Color.WHITE,20));sheet.setClipToOutline(true);
+        TextView title=ui.text("隐私政策",17,true);title.setGravity(Gravity.CENTER);sheet.addView(title,ui.size(-1,56));ui.divider(sheet);
+        sheet.addView(policy.view(ui),new LinearLayout.LayoutParams(-1,0,1));ui.divider(sheet);
+        LinearLayout actions=ui.column();actions.setPadding(ui.dp(20),ui.dp(12),ui.dp(20),ui.dp(12));sheet.addView(actions);
+        CheckBox hasReadPolicy=new CheckBox(activity);hasReadPolicy.setText("我已阅读并同意《隐私政策》");hasReadPolicy.setTextColor(INK);hasReadPolicy.setTextSize(14);hasReadPolicy.setMinHeight(ui.dp(44));actions.addView(hasReadPolicy,ui.size(-1,-2));ui.gap(actions,12);
+        TextView agree=ui.primary("同意并继续",()->{
+            if(!hasReadPolicy.isChecked()||!policy.available)return;
+            dismiss();accepted.run();
+        });agree.setEnabled(false);agree.setAlpha(.45f);actions.addView(agree,ui.size(-1,48));
+        hasReadPolicy.setOnCheckedChangeListener((button,checked)->{boolean enabled=checked&&policy.available;agree.setEnabled(enabled);agree.setAlpha(enabled?1:.45f);});
+        ui.gap(actions,12);actions.addView(ui.action("暂不同意",SECONDARY,this::dismiss),ui.size(-1,44));
+        setContentView(sheet);Window window=getWindow();if(window!=null){window.setBackgroundDrawableResource(android.R.color.transparent);window.setDimAmount(.22f);}
+    }
+    @Override public void show(){
+        super.show();Window window=getWindow();if(window!=null){window.setLayout(-1,Math.round(getContext().getResources().getDisplayMetrics().heightPixels*.9f));window.setGravity(Gravity.BOTTOM);}
+    }
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/PrivacyPolicyDocument.java

@@ -0,0 +1,39 @@
+package cn.crossdesk.mobile;
+
+import android.content.Context;
+import android.widget.LinearLayout;
+import android.widget.ScrollView;
+import android.widget.TextView;
+import java.io.IOException;
+
+import static cn.crossdesk.mobile.MobileUi.*;
+
+/** The same bundled policy as iOS, readable before any network consent. */
+final class PrivacyPolicyDocument {
+    final boolean available;
+    final String text;
+
+    PrivacyPolicyDocument(Context context){this(load(context));}
+    PrivacyPolicyDocument(String document){
+        available=document!=null&&!document.trim().isEmpty();
+        String value=available?document:"隐私政策暂时无法读取，请拒绝联网并重新安装应用。";
+        int start=value.indexOf("## 中文\n"),end=start<0?-1:value.indexOf("## English",start);
+        text=start>=0&&end>start?value.substring(start+"## 中文\n".length(),end).trim():value;
+    }
+    private static String load(Context context){
+        try{return LicenseCatalog.read(context,"PRIVACY.md");}catch(IOException error){return null;}
+    }
+    ScrollView view(MobileUi ui){
+        ScrollView scroll=new ScrollView(ui.context);scroll.setBackgroundColor(android.graphics.Color.WHITE);
+        LinearLayout content=ui.column();content.setPadding(ui.dp(20),ui.dp(20),ui.dp(20),ui.dp(20));scroll.addView(content);
+        for(String paragraph:text.split("\n\n")){
+            paragraph=paragraph.trim();if(paragraph.isEmpty()||paragraph.equals("---"))continue;
+            boolean heading=paragraph.startsWith("#"),date=paragraph.startsWith("更新日期：");
+            String value=heading?paragraph.replaceFirst("^#+\\s*",""):paragraph.replace("**","");
+            TextView label=ui.text(value,date?12:16,heading);label.setTextIsSelectable(true);label.setLineSpacing(ui.dp(4),1);
+            if(date)label.setTextColor(SECONDARY);
+            LinearLayout.LayoutParams spacing=new LinearLayout.LayoutParams(-1,-2);spacing.bottomMargin=ui.dp(14);content.addView(label,spacing);
+        }
+        return scroll;
+    }
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/RecentConnectionPresence.java

@@ -0,0 +1,85 @@
+package cn.crossdesk.mobile;
+
+import org.json.JSONArray;
+import org.json.JSONObject;
+import java.util.HashMap;
+import java.util.LinkedHashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.Consumer;
+
+/** Main-thread presence cache, with the same refresh and expiry intervals as iOS. */
+final class RecentConnectionPresence {
+    private static final long REFRESH_INTERVAL=30_000, MAX_AGE=60_000;
+    private final Set<String> watched=new LinkedHashSet<>();
+    private final Map<String,Boolean> online=new HashMap<>();
+    private final Map<String,Long> updatedAt=new HashMap<>();
+    private boolean connected,awaitingSnapshot=true;
+    private long lastRefresh;
+    Consumer<JSONArray> sender=ids->{};
+    Runnable changed=()->{};
+
+    void watch(JSONArray records,long now){
+        Set<String> next=new LinkedHashSet<>();
+        for(int i=0;i<records.length();i++){
+            JSONObject record=records.optJSONObject(i);
+            if(record!=null&&!record.optString("id").isEmpty())next.add(record.optString("id"));
+        }
+        if(watched.equals(next))return;
+        watched.clear();watched.addAll(next);
+        online.keySet().retainAll(watched);updatedAt.keySet().retainAll(watched);
+        refresh(now);changed.run();
+    }
+    void setConnected(boolean value,long now){
+        if(connected==value)return;
+        connected=value;online.clear();updatedAt.clear();awaitingSnapshot=true;
+        refresh(now);changed.run();
+    }
+    boolean isConnected(){return connected;}
+    boolean isOnline(String id,long now){
+        Long time=updatedAt.get(id);
+        return connected&&!awaitingSnapshot&&Boolean.TRUE.equals(online.get(id))&&time!=null&&now-time<MAX_AGE;
+    }
+    void receive(JSONObject message,long now){
+        if(!connected)return;
+        boolean snapshot="presence".equals(message.optString("type"));
+        Map<String,Boolean> values=new HashMap<>();
+        if(snapshot){
+            JSONArray devices=message.optJSONArray("devices");if(devices==null)return;
+            for(int i=0;i<devices.length();i++){JSONObject device=devices.optJSONObject(i);if(device!=null)read(device,values);}
+        }else{
+            if(!"presence_update".equals(message.optString("type"))||awaitingSnapshot)return;
+            read(message,values);
+        }
+        Map<String,Boolean> previous=new HashMap<>(online);
+        if(snapshot){online.clear();updatedAt.clear();awaitingSnapshot=false;}
+        for(var entry:values.entrySet()){online.put(entry.getKey(),entry.getValue());updatedAt.put(entry.getKey(),now);}
+        if(!previous.equals(online))changed.run();
+    }
+    private void read(JSONObject device,Map<String,Boolean> values){
+        Object id=device.opt("id"),value=device.opt("online");
+        if(id instanceof String&&watched.contains(id)&&value instanceof Boolean)values.put((String)id,(Boolean)value);
+    }
+    private void refresh(long now){
+        if(!connected)return;
+        lastRefresh=now;JSONArray ids=new JSONArray();for(String id:watched)ids.put(id);sender.accept(ids);
+    }
+    void maintain(long now){
+        if(!connected)return;
+        boolean expired=updatedAt.entrySet().removeIf(entry->{
+            if(now-entry.getValue()<MAX_AGE)return false;
+            online.remove(entry.getKey());return true;
+        });
+        if(expired)changed.run();
+        if(now-lastRefresh>=REFRESH_INTERVAL)refresh(now);
+    }
+    JSONArray ordered(JSONArray records,long now){
+        JSONArray result=new JSONArray();
+        // Preserve history order within each group, including when all devices are offline.
+        for(boolean available:new boolean[]{true,false})for(int i=0;i<records.length();i++){
+            JSONObject record=records.optJSONObject(i);
+            if(record!=null&&isOnline(record.optString("id"),now)==available)result.put(record);
+        }
+        return result;
+    }
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/RecentConnections.java

@@ -0,0 +1,52 @@
+package cn.crossdesk.mobile;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import org.json.JSONArray;
+import org.json.JSONObject;
+
+/** History and encrypted passwords are isolated by server; history never contains secrets. */
+final class RecentConnections {
+    private final SharedPreferences preferences;
+    private final SecretStore secrets;
+    private final Context context;
+    RecentConnections(Context context){this.context=context.getApplicationContext();preferences=context.getSharedPreferences("settings",Context.MODE_PRIVATE);secrets=new SecretStore(context);}
+    private String key(String server){return "recentList:"+server;}
+    private String credential(String server,String id){return "remote-password:"+server+":"+id;}
+    JSONArray list(String server){
+        try {
+            if(!preferences.contains(key(server))){
+                String legacy=preferences.getString("recent:"+server,"");
+                if(!legacy.isEmpty())return new JSONArray().put(new JSONObject().put("id",legacy).put("name",legacy));
+            }
+            return new JSONArray(preferences.getString(key(server),"[]"));
+        }
+        catch(org.json.JSONException error){return new JSONArray();}
+    }
+    boolean remembersPassword(String server,String id){
+        JSONArray records=list(server);
+        for(int i=0;i<records.length();i++){JSONObject item=records.optJSONObject(i);if(item!=null&&id.equals(item.optString("id")))return item.optBoolean("remember");}
+        return false;
+    }
+    String password(String server,String id)throws Exception{return secrets.get(credential(server,id));}
+    boolean contains(String server,String id){JSONArray all=list(server);for(int i=0;i<all.length();i++){JSONObject item=all.optJSONObject(i);if(item!=null&&id.equals(item.optString("id")))return true;}return false;}
+    void save(String server,String id,String name,String platform,boolean remember,String password)throws Exception{
+        if(remember&&password.isEmpty())throw new IllegalArgumentException("Cannot remember an empty password");
+        if(remember)secrets.put(credential(server,id),password);else secrets.remove(credential(server,id));
+        JSONObject item=new JSONObject().put("id",id).put("name",name.isEmpty()?id:name).put("platform",platform).put("remember",remember);
+        JSONArray result=new JSONArray().put(item),old=list(server);
+        for(int i=0;i<old.length();i++){JSONObject entry=old.optJSONObject(i);if(entry!=null&&!id.equals(entry.optString("id"))){if(result.length()<20)result.put(entry);else RemotePreviewStore.get(context).remove(server,entry.optString("id"));}}
+        preferences.edit().putString(key(server),result.toString()).apply();
+    }
+    void metadata(String server,String id,String name,String platform){
+        JSONArray all=list(server);
+        try{for(int i=0;i<all.length();i++){JSONObject item=all.optJSONObject(i);if(item!=null&&id.equals(item.optString("id"))){item.put("name",name.isEmpty()?id:name);item.put("platform",platform);}}}
+        catch(org.json.JSONException ignored){return;}
+        preferences.edit().putString(key(server),all.toString()).apply();
+    }
+    void delete(String server,String id){
+        JSONArray result=new JSONArray(),old=list(server);for(int i=0;i<old.length();i++){JSONObject entry=old.optJSONObject(i);if(entry!=null&&!id.equals(entry.optString("id")))result.put(entry);}
+        preferences.edit().putString(key(server),result.toString()).apply();secrets.remove(credential(server,id));
+        RemotePreviewStore.get(context).remove(server,id);
+    }
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/RemoteNetworkStatistics.java

@@ -0,0 +1,62 @@
+package cn.crossdesk.mobile;
+
+import org.json.JSONObject;
+import java.util.ArrayDeque;
+import java.util.Locale;
+
+/** Monotonic, thread-safe measurements; the UI samples these once a second, as on iOS. */
+final class RemoteNetworkStatistics {
+    static final class Traffic {
+        final long inbound,outbound;final double loss;
+        Traffic(JSONObject json){inbound=json.optLong("inbound",-1);outbound=json.optLong("outbound",-1);loss=json.optDouble("loss",Double.NaN);}
+    }
+    static final class Report {
+        final Traffic[] traffic=new Traffic[4];final int mode;final boolean srtp;final double rtt;
+        Report(JSONObject json){
+            String[] keys={"video","audio","data","total"};
+            for(int i=0;i<keys.length;i++){JSONObject item=json.optJSONObject(keys[i]);traffic[i]=item==null?null:new Traffic(item);}
+            mode=json.optInt("mode",2);srtp=json.optBoolean("srtp");rtt=json.optDouble("rtt",Double.NaN);
+        }
+    }
+    static final class Snapshot {
+        final Report report;final int fps,width,height;final double latency,rtt;
+        Snapshot(Report report,int fps,int width,int height,double latency,double rtt){this.report=report;this.fps=fps;this.width=width;this.height=height;this.latency=latency;this.rtt=rtt;}
+        String mode(){return report==null?"—":report.mode==0?"P2P 直连":report.mode==1?"TURN 中继":"—";}
+        String resolution(){return width>0&&height>0?width+" × "+height:"—";}
+        String summary(){
+            String value=mode()+(width>0&&height>0?" · "+width+"×"+height:"")+" · "+bitrate(report==null||report.traffic[3]==null?-1:report.traffic[3].inbound);
+            if(report!=null&&report.traffic[0]!=null&&report.traffic[0].loss>0)value+=" · 丢包 "+loss(report.traffic[0].loss);return value;
+        }
+    }
+    private static final class Frame {
+        final double time,latency;Frame(double time,double latency){this.time=time;this.latency=latency;}
+    }
+    private Report report;
+    private double reportTime,rttTime,averageRtt=Double.NaN;
+    private long lastFrameId;
+    private int width,height;
+    private final ArrayDeque<Frame> frames=new ArrayDeque<>();
+    static double now(){return System.nanoTime()/1_000_000_000.0;}
+    synchronized void receive(Report value,double now){
+        report=value;reportTime=now;
+        if(!Double.isFinite(value.rtt)||value.rtt<0||value.rtt>2000)return;
+        averageRtt=Double.isFinite(averageRtt)&&now-rttTime<3?averageRtt+.25*(value.rtt-averageRtt):value.rtt;rttTime=now;
+    }
+    synchronized void frame(long id,double latency,int width,int height,double now){
+        if(id<=lastFrameId||width<=0||height<=0)return;lastFrameId=id;this.width=width;this.height=height;
+        // Native code validates clock calibration before adding local decode/render waits.
+        // A valid but slow frame must not disappear just because its delay exceeds 5 s.
+        prune(now);frames.addLast(new Frame(now,Double.isFinite(latency)&&latency>=0?latency:Double.NaN));
+        while(frames.size()>240)frames.removeFirst();
+    }
+    synchronized void resetVideo(){frames.clear();width=height=0;}
+    synchronized Snapshot snapshot(double now){
+        prune(now);double total=0;int count=0;
+        for(Frame frame:frames)if(Double.isFinite(frame.latency)){total+=frame.latency;count++;}
+        return new Snapshot(now-reportTime<3?report:null,frames.size(),width,height,count==0?Double.NaN:total/count,now-rttTime<3?averageRtt:Double.NaN);
+    }
+    private void prune(double now){while(!frames.isEmpty()&&now-frames.peekFirst().time>=1)frames.removeFirst();}
+    static String bitrate(long value){return value<0?"—":value>=1_000_000?String.format(Locale.ROOT,"%.1f Mbps",value/1_000_000.0):value>=1000?String.format(Locale.ROOT,"%.0f Kbps",value/1000.0):value+" bps";}
+    static String loss(double value){return Double.isFinite(value)&&value>=0?String.format(Locale.ROOT,"%.1f%%",value*100):"—";}
+    static String latency(double value){return !Double.isFinite(value)||value<0?"—":value<1?"<1 ms":String.format(Locale.ROOT,"%.0f ms",value);}
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/RemotePreviewStore.java

@@ -0,0 +1,163 @@
+package cn.crossdesk.mobile;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.os.Handler;
+import android.os.Looper;
+import android.util.AtomicFile;
+import org.json.JSONArray;
+import java.io.*;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.security.MessageDigest;
+import java.util.*;
+import java.util.concurrent.*;
+import java.util.function.Consumer;
+
+/** Process-wide, serialized preview I/O. Clears invalidate even captures not yet queued for saving. */
+final class RemotePreviewStore {
+    static final String OPTION="saveRemotePreviews";
+    static final int WIDTH=640,HEIGHT=360;
+    private static RemotePreviewStore instance;
+    static synchronized RemotePreviewStore get(Context context){
+        if(instance==null){
+            Context app=context.getApplicationContext();
+            instance=new RemotePreviewStore(new File(app.getNoBackupFilesDir(),"RecentConnectionThumbnails"),
+                app.getSharedPreferences("settings",Context.MODE_PRIVATE),app.getSharedPreferences("remote-previews",Context.MODE_PRIVATE));
+            instance.enforceConsent();
+        }
+        return instance;
+    }
+    static final class Capture {
+        final String key;final long generation,version;
+        private Capture(String key,long generation,long version){this.key=key;this.generation=generation;this.version=version;}
+    }
+    final File directory;
+    final ExecutorService io=Executors.newSingleThreadExecutor(r->new Thread(r,"CrossDesk previews"));
+    private final Handler main=new Handler(Looper.getMainLooper());
+    private final SharedPreferences options,index;
+    private final Set<String> files=new HashSet<>();
+    private final Map<String,Long> versions=new HashMap<>();
+    private final Set<Runnable> listeners=new CopyOnWriteArraySet<>();
+    private long generation;
+    volatile boolean cleaning;
+    volatile String cleanupError="";
+    RemotePreviewStore(File directory,SharedPreferences options,SharedPreferences index){
+        this.directory=directory;this.options=options;this.index=index;
+        for(String key:index.getStringSet("files",Collections.emptySet()))if(key.matches("[a-f0-9]{64}"))files.add(key);
+    }
+    boolean enabled(){return options.getBoolean("networkConsent",false)&&options.getBoolean(OPTION,false);}
+    void addListener(Runnable listener){listeners.add(listener);}
+    void removeListener(Runnable listener){listeners.remove(listener);}
+    private void changed(){main.post(()->{for(Runnable listener:listeners)listener.run();});}
+    synchronized void enforceConsent(){
+        if(!options.getBoolean("networkConsent",false))options.edit().putBoolean(OPTION,false).apply();
+        if(!enabled()&&!cleaning)clear();
+    }
+    void setEnabled(boolean enabled){
+        options.edit().putBoolean(OPTION,enabled&&options.getBoolean("networkConsent",false)).apply();
+        if(!enabled())clear();else changed();
+    }
+    synchronized Capture begin(String server,String id){
+        if(!enabled()||cleaning||id.isEmpty())return null;
+        String key=key(server,id);long version=versions.getOrDefault(key,0L)+1;versions.put(key,version);
+        return new Capture(key,generation,version);
+    }
+    synchronized boolean current(Capture capture){
+        return capture!=null&&enabled()&&!cleaning&&capture.generation==generation&&
+            capture.version==versions.getOrDefault(capture.key,0L);
+    }
+    /** Takes ownership of the small bitmap; JPEG compression and writes never run on the UI thread. */
+    void save(Capture capture,Bitmap bitmap){
+        io.execute(()->{
+            boolean saved=false;
+            try{
+                if(current(capture)&&bitmap.getWidth()==WIDTH&&bitmap.getHeight()==HEIGHT)saved=write(capture.key,bitmap);
+            }finally{bitmap.recycle();}
+            synchronized(this){
+                if(!saved||!current(capture))return;
+                Set<String> next=new HashSet<>(files);next.add(capture.key);
+                if(!index.edit().putStringSet("files",next).commit())return;
+                files.add(capture.key);
+            }
+            changed();
+        });
+    }
+    private boolean write(String key,Bitmap bitmap){
+        AtomicFile file=new AtomicFile(new File(directory,key+".jpg"));FileOutputStream output=null;
+        try{
+            ByteArrayOutputStream encoded=new ByteArrayOutputStream();
+            if(!bitmap.compress(Bitmap.CompressFormat.JPEG,78,encoded))return false;
+            byte[] bytes=encoded.toByteArray();
+            if(!directory.isDirectory()&&!directory.mkdirs())return false;
+            output=file.startWrite();output.write(bytes);
+            output.getFD().sync();file.finishWrite(output);output=null;
+            return Arrays.equals(bytes,file.readFully());
+        }catch(IOException|RuntimeException error){if(output!=null)file.failWrite(output);return false;}
+    }
+    void load(String server,String id,Consumer<Bitmap> receive){
+        final Capture read;
+        synchronized(this){
+            String key=key(server,id);
+            if(!enabled()||cleaning||!files.contains(key)){main.post(()->receive.accept(null));return;}
+            read=new Capture(key,generation,versions.getOrDefault(key,0L));
+        }
+        io.execute(()->{
+            Bitmap bitmap=null;
+            if(current(read)){
+                File file=new File(directory,read.key+".jpg");
+                if(file.isFile()&&file.length()<=2*1024*1024){
+                    BitmapFactory.Options bounds=new BitmapFactory.Options();bounds.inJustDecodeBounds=true;
+                    BitmapFactory.decodeFile(file.getAbsolutePath(),bounds);
+                    if(bounds.outWidth==WIDTH&&bounds.outHeight==HEIGHT)bitmap=BitmapFactory.decodeFile(file.getAbsolutePath());
+                }
+            }
+            Bitmap image=bitmap;
+            main.post(()->{
+                boolean valid;synchronized(this){valid=current(read)&&files.contains(read.key);}
+                if(valid)receive.accept(image);else if(image!=null)image.recycle();
+            });
+        });
+    }
+    synchronized void remove(String server,String id){
+        String key=key(server,id);versions.put(key,versions.getOrDefault(key,0L)+1);files.remove(key);
+        io.execute(()->{
+            new AtomicFile(new File(directory,key+".jpg")).delete();
+            synchronized(this){
+                boolean saved=index.edit().putStringSet("files",new HashSet<>(files)).commit();
+                if(!saved||new File(directory,key+".jpg").exists())cleanupError="部分预览图未能清除，请重试。";
+            }
+            changed();
+        });changed();
+    }
+    synchronized void clear(){
+        final long epoch=++generation;files.clear();cleaning=true;cleanupError="";changed();
+        io.execute(()->{
+            boolean success=index.edit().clear().commit();
+            try{deleteTree(directory);}catch(IOException error){success=false;}
+            synchronized(this){
+                if(epoch!=generation)return;
+                cleaning=false;cleanupError=success?"":"部分预览图未能清除，请重试。";
+            }
+            changed();
+        });
+    }
+    private static void deleteTree(File file)throws IOException{
+        if(!file.exists())return;
+        if(file.isDirectory()&&!Files.isSymbolicLink(file.toPath())){
+            File[] children=file.listFiles();if(children==null)throw new IOException("Cannot list previews");
+            boolean failed=false;for(File child:children)try{deleteTree(child);}catch(IOException error){failed=true;}
+            if(failed)throw new IOException("Cannot clear all previews");
+        }
+        if(!file.delete())throw new IOException("Cannot delete preview");
+    }
+    private static String key(String server,String id){
+        try{
+            byte[] bytes=new JSONArray().put(server).put(id).toString().getBytes(StandardCharsets.UTF_8);
+            byte[] hash=MessageDigest.getInstance("SHA-256").digest(bytes);StringBuilder key=new StringBuilder();
+            for(byte b:hash)key.append(String.format(Locale.ROOT,"%02x",b&255));return key.toString();
+        }catch(Exception error){throw new IllegalStateException(error);}
+    }
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/RemoteVersionCheck.java

@@ -0,0 +1,130 @@
+package cn.crossdesk.mobile;
+
+import android.os.Handler;
+import android.os.Looper;
+import org.json.JSONObject;
+import java.io.ByteArrayOutputStream;
+import java.io.InputStream;
+import java.net.URL;
+import java.util.function.Consumer;
+import javax.net.ssl.HttpsURLConnection;
+
+/** One check per desktop session. State and completion callbacks run on main. */
+final class RemoteVersionCheck {
+    static final String NOTICE = "被控端版本过低，请升级到最新版本。";
+    static final String RELEASE_URL = "https://version.crossdesk.cn/version.json";
+    interface Cancellation { void cancel(); }
+    interface Fetcher { Cancellation fetch(Consumer<byte[]> completion); }
+
+    private final Fetcher fetcher;
+    private final Runnable notify;
+    private boolean connected, receivedHostInfo, attempted;
+    private String version = "";
+    private long generation;
+    private Cancellation request;
+
+    RemoteVersionCheck(Runnable notify) { this(ReleaseRequest::start, notify); }
+    RemoteVersionCheck(Fetcher fetcher, Runnable notify) {
+        this.fetcher = fetcher;
+        this.notify = notify;
+    }
+
+    void connected() { connected = true; check(); }
+
+    void hostInfo(JSONObject info) {
+        receivedHostInfo = true;
+        Object value = info.opt("app_version");
+        version = value instanceof String && NativeSession.nValidAppVersion((String)value)
+                ? (String)value : "";
+        check();
+    }
+
+    private void check() {
+        if (!connected || !receivedHostInfo || attempted) return;
+        attempted = true;
+        // iOS treats missing/invalid peer versions as legacy, without a request.
+        if (version.isEmpty()) { notify.run(); return; }
+        long currentGeneration = generation;
+        String currentVersion = version;
+        request = fetcher.fetch(data -> {
+            if (generation != currentGeneration || !connected) return;
+            request = null;
+            if (data != null && NativeSession.nHasAppUpdate(currentVersion, data)) notify.run();
+        });
+    }
+
+    void reset() {
+        ++generation;
+        connected = receivedHostInfo = attempted = false;
+        version = "";
+        if (request != null) request.cancel();
+        request = null;
+    }
+
+    private static final class ReleaseRequest implements Cancellation, Runnable {
+        private static final int MAX_BYTES = 256 * 1024;
+        private final Handler main = new Handler(Looper.getMainLooper());
+        private final Consumer<byte[]> completion;
+        private final Runnable timeout = () -> finish(null);
+        private volatile boolean cancelled;
+        private HttpsURLConnection connection;
+
+        private ReleaseRequest(Consumer<byte[]> completion) { this.completion = completion; }
+        static Cancellation start(Consumer<byte[]> completion) {
+            ReleaseRequest request = new ReleaseRequest(completion);
+            request.main.postDelayed(request.timeout, 15000);
+            Thread worker = new Thread(request, "CrossDesk version check");
+            worker.setDaemon(true);
+            worker.start();
+            return request;
+        }
+
+        @Override public void run() {
+            byte[] result = null;
+            HttpsURLConnection opened = null;
+            try {
+                // Fetch public metadata only: no peer identity, version or credentials.
+                opened = (HttpsURLConnection)new URL(RELEASE_URL).openConnection();
+                synchronized (this) {
+                    if (cancelled) return;
+                    connection = opened;
+                }
+                opened.setConnectTimeout(5000);
+                opened.setReadTimeout(10000);
+                opened.setUseCaches(false);
+                opened.setInstanceFollowRedirects(false);
+                if (opened.getResponseCode() == 200 && opened.getContentLengthLong() <= MAX_BYTES) {
+                    try (InputStream input = opened.getInputStream();
+                         ByteArrayOutputStream output = new ByteArrayOutputStream()) {
+                        byte[] buffer = new byte[4096];
+                        int count;
+                        while (!cancelled && (count = input.read(buffer)) != -1) {
+                            if (output.size() + count > MAX_BYTES) return;
+                            output.write(buffer, 0, count);
+                        }
+                        if (!cancelled) result = output.toByteArray();
+                    }
+                }
+            } catch (Exception ignored) {
+                // A failed check is silent, as on iOS; it never interrupts control.
+            } finally {
+                if (opened != null) opened.disconnect();
+                byte[] response = result;
+                main.post(() -> finish(response));
+            }
+        }
+
+        private void finish(byte[] response) {
+            if (cancelled) return;
+            cancel();
+            completion.accept(response);
+        }
+
+        @Override public void cancel() {
+            HttpsURLConnection active;
+            synchronized (this) { cancelled = true; active = connection; connection = null; }
+            main.removeCallbacks(timeout);
+            if (active != null) active.disconnect();
+        }
+    }
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/RemoteVideoSettings.java

@@ -0,0 +1,58 @@
+package cn.crossdesk.mobile;
+
+import org.json.JSONObject;
+
+/** Same request/acknowledgement and rollback rules as the iOS controller. */
+final class RemoteVideoSettings {
+    static final String[] PREFERENCES={"帧率优先","画质优先","平衡"};
+    static final String[] DETAILS={
+        "优先保持画面流畅，带宽或编码压力较大时会更积极地降低分辨率。",
+        "始终保持较高分辨率，带宽不足时通过降低帧率来保证画面清晰度。",
+        "兼顾清晰度和流畅度，只在持续压力下逐步降低分辨率。"};
+    static final class Values {
+        final int quality,frameRate,preference;
+        Values(int quality,int frameRate,int preference){this.quality=quality;this.frameRate=frameRate;this.preference=preference;}
+        boolean valid(){return quality>=0&&quality<=2&&(frameRate==30||frameRate==60)&&preference>=0&&preference<=2;}
+        JSONObject status(long requestId,boolean accepted){
+            try{return new JSONObject().put("type",12).put("video_settings",new JSONObject().put("quality",quality).put("frame_rate",frameRate).put("preference",preference).put("request_id",requestId).put("accepted",accepted));}
+            catch(org.json.JSONException impossible){throw new IllegalStateException(impossible);}
+        }
+    }
+    boolean supported,pending,failed;
+    Values selection,applied;
+    long requestId,appliedRequestId;
+    RemoteVideoSettings(int preference){this(preference,1920);}
+    RemoteVideoSettings(int preference,int displayLongEdge){
+        // Start within common mobile decoder limits. Hardware availability and
+        // maximum resolution vary, and AV1 may still need software fallback.
+        // Small screens need no more than 720p; larger screens start at 1080p.
+        // All quality/frame-rate choices remain available for manual adjustment.
+        selection=applied=new Values(displayLongEdge>0&&displayLongEdge<=1280?0:1,30,preference>=0&&preference<=2?preference:1);
+    }
+    void setSupported(boolean value){supported=value;if(!value){selection=applied;pending=false;failed=false;}}
+    long begin(Values value){
+        if(!supported||!value.valid())return -1;
+        requestId=(requestId+1)&0xffffffffL;selection=value;pending=true;failed=false;return requestId;
+    }
+    void receive(Values value,long responseId,boolean accepted){
+        if(!supported||!value.valid()||responseId<0||responseId>0xffffffffL||(int)(requestId-responseId)<0)return;
+        if(accepted&&(int)(responseId-appliedRequestId)>=0){applied=value;appliedRequestId=responseId;}
+        if(responseId!=requestId)return;
+        pending=false;failed=!accepted;selection=applied;
+    }
+    void receive(JSONObject message){
+        try{
+            if(message.getInt("type")!=12)return;
+            JSONObject settings=message.getJSONObject("video_settings");
+            for(String key:new String[]{"quality","frame_rate","preference","request_id"}){
+                Object value=settings.get(key);if(!(value instanceof Integer)&&!(value instanceof Long))return;
+            }
+            long quality=settings.getLong("quality"),rate=settings.getLong("frame_rate"),preference=settings.getLong("preference");
+            if(quality<0||quality>2||(rate!=30&&rate!=60)||preference<0||preference>2)return;
+            Object accepted=settings.opt("accepted");if(accepted!=null&&!(accepted instanceof Boolean))return;
+            receive(new Values((int)quality,(int)rate,(int)preference),settings.getLong("request_id"),Boolean.TRUE.equals(accepted));
+        }catch(org.json.JSONException ignored){ }
+    }
+    void expire(long expiredId){if(pending&&expiredId==requestId){selection=applied;pending=false;failed=true;}}
+    String feedback(){return !supported?"连接建立后可调整，需被控端支持。":failed?"调整失败，请重试。":"";}
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/RemoteVideoView.java

@@ -0,0 +1,230 @@
+package cn.crossdesk.mobile;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.Path;
+import android.graphics.Bitmap;
+import android.graphics.Rect;
+import android.os.Handler;
+import android.os.Looper;
+import android.view.PixelCopy;
+import android.view.GestureDetector;
+import android.view.MotionEvent;
+import android.view.ScaleGestureDetector;
+import android.view.SurfaceHolder;
+import android.view.SurfaceView;
+import android.view.View;
+import android.widget.FrameLayout;
+
+@android.annotation.SuppressLint("ViewConstructor") // Constructed only with a live session, never from XML.
+final class RemoteVideoView extends FrameLayout implements SurfaceHolder.Callback {
+    private final SurfaceView video;
+    private final Cursor cursor;
+    private final NativeSession session;
+    private final GestureDetector gestures;
+    private final ScaleGestureDetector scales;
+    private final RemoteViewport viewport = new RemoteViewport();
+    private int frameWidth = 16, frameHeight = 9;
+    private float x = .5f, y = .5f, scrollY;
+    private boolean dragging, twoFinger, relative, viewportGesture, viewportPanActive;
+    private float lastX,lastY,twoFingerX,twoFingerY;
+    void setRelative(boolean value) { relative=value; }
+    RemoteVideoView(Context context, NativeSession session) {
+        super(context); this.session = session;
+        setBackgroundColor(Color.BLACK);
+        video = new SurfaceView(context); video.getHolder().addCallback(this);
+        addView(video, new LayoutParams(1, 1, android.view.Gravity.CENTER));
+        cursor = new Cursor(context);
+        // Keep input in container coordinates so transforms never move its hit area.
+        addView(cursor, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
+        gestures = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
+            @Override public boolean onDown(MotionEvent e) { return point(e); }
+            @Override public boolean onSingleTapUp(MotionEvent e) {
+                if (!twoFinger && point(e)) cursor.performClick(); return true;
+            }
+            @Override public void onLongPress(MotionEvent e) { if (!twoFinger && !dragging && point(e)) click(3, 4); }
+            @Override public boolean onScroll(MotionEvent first, MotionEvent current, float dx, float dy) {
+                if (twoFinger) return true;
+                if (!relative && !dragging) {
+                    if (!point(first)) return true;
+                    session.pointer(x, y, 1, 0); dragging = true;
+                }
+                point(current); return true;
+            }
+        });
+        scales = new ScaleGestureDetector(context, new ScaleGestureDetector.SimpleOnScaleGestureListener() {
+            @Override public boolean onScaleBegin(ScaleGestureDetector detector) {
+                if (!viewport.contains(detector.getFocusX(), detector.getFocusY())) return false;
+                viewportGesture = true;
+                viewportPanActive = true;
+                return true;
+            }
+            @Override public boolean onScale(ScaleGestureDetector detector) {
+                viewport.zoomBy(detector.getScaleFactor(), detector.getFocusX(), detector.getFocusY());
+                applyViewport();
+                return true;
+            }
+            @Override public void onScaleEnd(ScaleGestureDetector detector) {
+                viewport.finishGesture();
+                applyViewport();
+            }
+        });
+        scales.setQuickScaleEnabled(false);
+        scales.setStylusScaleEnabled(false);
+        cursor.setOnGenericMotionListener((v, event) -> {
+            if (!point(event)) return true;
+            if (event.getActionMasked() == MotionEvent.ACTION_SCROLL) {
+                float delta = event.getAxisValue(MotionEvent.AXIS_VSCROLL);
+                if (delta != 0) session.pointer(x, y, 7, delta > 0 ? 1 : -1);
+            }
+            return true;
+        });
+        setContentDescription("远程桌面：轻触点击，拖动移动，长按右键，双指捏合缩放，放大后双指拖动画面，原始比例下双指上下滑动滚动");
+    }
+    void videoSize(int width, int height) {
+        if (width <= 0 || height <= 0) return;
+        frameWidth = width; frameHeight = height; fit();
+    }
+    void resetViewport() { viewport.reset(); applyViewport(); }
+    static Rect previewCrop(int width,int height){
+        int w=width,h=height;
+        if((long)width*RemotePreviewStore.HEIGHT>(long)height*RemotePreviewStore.WIDTH)w=Math.max(1,height*RemotePreviewStore.WIDTH/RemotePreviewStore.HEIGHT);
+        else h=Math.max(1,width*RemotePreviewStore.HEIGHT/RemotePreviewStore.WIDTH);
+        return new Rect((width-w)/2,(height-h)/2,(width+w)/2,(height+h)/2);
+    }
+    void capturePreview(java.util.function.Consumer<Bitmap> completion){
+        // Copy only the decoded-video Surface, excluding cursor, controls, keyboard and black margins.
+        if(!isAttachedToWindow()||!video.getHolder().getSurface().isValid()){completion.accept(null);return;}
+        Bitmap image=Bitmap.createBitmap(RemotePreviewStore.WIDTH,RemotePreviewStore.HEIGHT,Bitmap.Config.ARGB_8888);
+        try{
+            PixelCopy.request(video.getHolder().getSurface(),previewCrop(frameWidth,frameHeight),image,result->{
+                if(result==PixelCopy.SUCCESS)completion.accept(image);else{image.recycle();completion.accept(null);}
+            },new Handler(Looper.getMainLooper()));
+        }catch(IllegalArgumentException error){image.recycle();completion.accept(null);}
+    }
+    private void fit() {
+        if (getWidth() == 0 || getHeight() == 0) return;
+        viewport.fit(getWidth(), getHeight(), frameWidth, frameHeight);
+        video.setLayoutParams(new LayoutParams(viewport.baseWidth(),viewport.baseHeight(),android.view.Gravity.CENTER));
+        applyViewport();
+    }
+    private void applyViewport() {
+        // Transform the existing Surface without enlarging its decoder buffers.
+        video.setScaleX(viewport.scale()); video.setScaleY(viewport.scale());
+        video.setTranslationX(viewport.offsetX()); video.setTranslationY(viewport.offsetY());
+        cursor.invalidate();
+    }
+    @Override protected void onSizeChanged(int w,int h,int oldw,int oldh) { post(this::fit); }
+    private boolean point(MotionEvent e) {
+        boolean touchpad = relative && e.getToolType(0) != MotionEvent.TOOL_TYPE_MOUSE;
+        float px=e.getX(),py=e.getY();
+        if (!touchpad && !viewport.contains(px,py)) return false;
+        if(touchpad){
+            if(e.getActionMasked()==MotionEvent.ACTION_MOVE){
+                x=Math.max(0,Math.min(1,x+(px-lastX)/Math.max(1,viewport.width())));
+                y=Math.max(0,Math.min(1,y+(py-lastY)/Math.max(1,viewport.height())));
+            }
+        }else{
+            x=viewport.normalizedX(px);
+            y=viewport.normalizedY(py);
+        }
+        lastX=px;lastY=py;
+        session.pointer(x,y,0,0); cursor.invalidate();
+        return true;
+    }
+    private void click(int down, int up) { session.pointer(x,y,down,0); session.pointer(x,y,up,0); }
+    private boolean touch(MotionEvent e) {
+        int action = e.getActionMasked();
+        if (action == MotionEvent.ACTION_DOWN) {
+            twoFinger = viewportGesture = viewportPanActive = false;
+        }
+        if (action == MotionEvent.ACTION_POINTER_DOWN) {
+            if (dragging) { session.pointer(x,y,2,0); dragging = false; }
+            twoFinger = true;
+            twoFingerX = focus(e,true,-1); twoFingerY = scrollY = focus(e,false,-1);
+            viewportPanActive = viewport.isZoomed() && viewport.contains(twoFingerX,twoFingerY);
+            MotionEvent cancel = MotionEvent.obtain(e); cancel.setAction(MotionEvent.ACTION_CANCEL);
+            gestures.onTouchEvent(cancel); cancel.recycle();
+        }
+        scales.onTouchEvent(e);
+        if (twoFinger && action == MotionEvent.ACTION_MOVE && e.getPointerCount() >= 2) {
+            float focusX = focus(e,true,-1), focusY = focus(e,false,-1);
+            if (viewport.isZoomed() || viewportGesture || scales.isInProgress()) {
+                viewportGesture = true;
+                if (!viewportPanActive) viewportPanActive = viewport.contains(focusX,focusY);
+                if (viewportPanActive) {
+                    viewport.panBy(focusX-twoFingerX,focusY-twoFingerY);
+                    applyViewport();
+                }
+            } else if (viewport.contains(focusX,focusY)) {
+                float delta = focusY - scrollY;
+                if (Math.abs(delta) > 16 * getResources().getDisplayMetrics().density) {
+                    session.pointer(x,y,7,delta > 0 ? 1 : -1); scrollY = focusY;
+                }
+            }
+            twoFingerX = focusX; twoFingerY = focusY;
+        } else if (!twoFinger) {
+            if ((e.getButtonState() & MotionEvent.BUTTON_SECONDARY) != 0 && action == MotionEvent.ACTION_DOWN) {
+                if (point(e)) click(3,4); return true;
+            }
+            gestures.onTouchEvent(e);
+        }
+        if (action == MotionEvent.ACTION_POINTER_UP) {
+            // Rebase when a finger lifts; never resume a click/drag until all lift.
+            twoFingerX = focus(e,true,e.getActionIndex());
+            twoFingerY = scrollY = focus(e,false,e.getActionIndex());
+        }
+        if (action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_CANCEL) {
+            if (dragging) session.pointer(x,y,2,0);
+            dragging = false;
+            viewport.finishGesture(); applyViewport();
+            viewportPanActive = false;
+        }
+        return true;
+    }
+    private static float focus(MotionEvent event, boolean horizontal, int excludedIndex) {
+        float total = 0; int count = 0;
+        for (int i=0;i<event.getPointerCount();i++) {
+            if (i==excludedIndex) continue;
+            total += horizontal ? event.getX(i) : event.getY(i); count++;
+        }
+        return total / Math.max(1,count);
+    }
+    @Override public boolean performClick() { super.performClick(); return true; }
+    @Override public void surfaceCreated(SurfaceHolder holder) { session.surface(holder.getSurface()); }
+    @Override public void surfaceChanged(SurfaceHolder holder,int format,int width,int height) { }
+    @Override public void surfaceDestroyed(SurfaceHolder holder) { session.surface(null); }
+    private final class Cursor extends View {
+        private final Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        private final Path arrow = new Path();
+        private final float arrowWidth = 12, arrowHeight = 15;
+        Cursor(Context context) {
+            super(context); setClickable(true); setContentDescription("远程桌面触控区域");
+            // Match the iOS RemoteCursorArrowShape in density-independent units.
+            arrow.moveTo(arrowWidth*.08f,arrowHeight*.04f);
+            arrow.lineTo(arrowWidth*.08f,arrowHeight*.78f);
+            arrow.lineTo(arrowWidth*.34f,arrowHeight*.60f);
+            arrow.lineTo(arrowWidth*.55f,arrowHeight*.94f);
+            arrow.lineTo(arrowWidth*.73f,arrowHeight*.84f);
+            arrow.lineTo(arrowWidth*.52f,arrowHeight*.51f);
+            arrow.lineTo(arrowWidth*.88f,arrowHeight*.49f);
+            arrow.close();
+        }
+        // GestureDetector calls performClick only after resolving tap vs drag/long press.
+        @android.annotation.SuppressLint("ClickableViewAccessibility")
+        @Override public boolean onTouchEvent(MotionEvent event) { return touch(event); }
+        @Override public boolean performClick() { super.performClick(); click(1, 2); return true; }
+        @Override protected void onDraw(Canvas canvas) {
+            int saved=canvas.save();
+            canvas.translate(viewport.left()+x*viewport.width(),viewport.top()+y*viewport.height());
+            float density=getResources().getDisplayMetrics().density;canvas.scale(density,density);
+            // Anchor the arrow tip to the same normalized coordinate sent to the desktop.
+            canvas.translate(-arrowWidth*.08f,-arrowHeight*.04f);
+            paint.setStyle(Paint.Style.STROKE);paint.setStrokeWidth(1.75f);paint.setColor(Color.BLACK);canvas.drawPath(arrow,paint);
+            paint.setStyle(Paint.Style.FILL);paint.setColor(Color.WHITE);canvas.drawPath(arrow,paint);
+            canvas.restoreToCount(saved);
+        }
+    }
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/RemoteViewport.java

@@ -0,0 +1,74 @@
+package cn.crossdesk.mobile;
+
+/** Geometry shared by the video Surface, cursor and remote pointer input. */
+final class RemoteViewport {
+    private static final float MAXIMUM_SCALE = 10;
+    private int baseWidth, baseHeight, baseLeft, baseTop;
+    private float scale = 1, offsetX, offsetY;
+
+    void fit(int width, int height, int videoWidth, int videoHeight) {
+        if (width <= 0 || height <= 0 || videoWidth <= 0 || videoHeight <= 0) return;
+        double fitScale = Math.min((double) width / videoWidth, (double) height / videoHeight);
+        baseWidth = Math.max(1, (int) (videoWidth * fitScale));
+        baseHeight = Math.max(1, (int) (videoHeight * fitScale));
+        // Match the integer positioning of Gravity.CENTER, including odd margins.
+        baseLeft = (width - baseWidth) / 2;
+        baseTop = (height - baseHeight) / 2;
+        constrainOffset();
+    }
+
+    int baseWidth() { return baseWidth; }
+    int baseHeight() { return baseHeight; }
+    float scale() { return scale; }
+    float offsetX() { return offsetX; }
+    float offsetY() { return offsetY; }
+    float width() { return baseWidth * scale; }
+    float height() { return baseHeight * scale; }
+    float left() { return baseLeft + baseWidth * (1 - scale) / 2 + offsetX; }
+    float top() { return baseTop + baseHeight * (1 - scale) / 2 + offsetY; }
+    boolean isZoomed() { return scale > 1.001f; }
+
+    boolean contains(float x, float y) {
+        return baseWidth > 0 && baseHeight > 0 &&
+            x >= left() && x < left() + width() && y >= top() && y < top() + height();
+    }
+
+    float normalizedX(float x) { return clamp((x - left()) / Math.max(1, width()), 0, 1); }
+    float normalizedY(float y) { return clamp((y - top()) / Math.max(1, height()), 0, 1); }
+
+    void zoomBy(float factor, float focusX, float focusY) {
+        if (baseWidth == 0 || baseHeight == 0 || !Float.isFinite(factor) || factor <= 0) return;
+        float nextScale = clamp(scale * factor, 1, MAXIMUM_SCALE);
+        float ratio = nextScale / scale;
+        float focusFromCenterX = focusX - (baseLeft + baseWidth / 2f);
+        float focusFromCenterY = focusY - (baseTop + baseHeight / 2f);
+        offsetX = focusFromCenterX - (focusFromCenterX - offsetX) * ratio;
+        offsetY = focusFromCenterY - (focusFromCenterY - offsetY) * ratio;
+        scale = nextScale;
+        constrainOffset();
+    }
+
+    void panBy(float dx, float dy) {
+        offsetX += dx;
+        offsetY += dy;
+        constrainOffset();
+    }
+
+    void finishGesture() {
+        if (!isZoomed()) reset();
+    }
+
+    void reset() { scale = 1; offsetX = offsetY = 0; }
+
+    private void constrainOffset() {
+        // Keep the original fitted area covered, as on iOS, even with letterboxing.
+        float maximumX = baseWidth * (scale - 1) / 2;
+        float maximumY = baseHeight * (scale - 1) / 2;
+        offsetX = clamp(offsetX, -maximumX, maximumX);
+        offsetY = clamp(offsetY, -maximumY, maximumY);
+    }
+
+    private static float clamp(float value, float minimum, float maximum) {
+        return Math.max(minimum, Math.min(maximum, value));
+    }
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/SecretStore.java

@@ -0,0 +1,52 @@
+package cn.crossdesk.mobile;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.security.keystore.KeyGenParameterSpec;
+import android.security.keystore.KeyProperties;
+import android.util.Base64;
+import java.nio.charset.StandardCharsets;
+import java.security.KeyStore;
+import javax.crypto.Cipher;
+import javax.crypto.KeyGenerator;
+import javax.crypto.SecretKey;
+import javax.crypto.spec.GCMParameterSpec;
+
+/** Server-scoped credentials encrypted with a non-exportable Android Keystore key. */
+final class SecretStore {
+    private static final String ALIAS = "crossdesk.signaling.v1";
+    private final SharedPreferences preferences;
+    SecretStore(Context context) { preferences = context.getSharedPreferences("identities", Context.MODE_PRIVATE); }
+    private SecretKey key() throws Exception {
+        KeyStore store = KeyStore.getInstance("AndroidKeyStore");
+        store.load(null);
+        if (!store.containsAlias(ALIAS)) {
+            KeyGenerator generator = KeyGenerator.getInstance(KeyProperties.KEY_ALGORITHM_AES, "AndroidKeyStore");
+            generator.init(new KeyGenParameterSpec.Builder(ALIAS,
+                    KeyProperties.PURPOSE_ENCRYPT | KeyProperties.PURPOSE_DECRYPT)
+                    .setBlockModes(KeyProperties.BLOCK_MODE_GCM)
+                    .setEncryptionPaddings(KeyProperties.ENCRYPTION_PADDING_NONE).build());
+            generator.generateKey();
+        }
+        return (SecretKey) store.getKey(ALIAS, null);
+    }
+    String get(String scope) throws Exception {
+        String stored = preferences.getString(scope, "");
+        if (stored.isEmpty()) return "";
+        String[] parts = stored.split(":", 2);
+        if (parts.length != 2) throw new IllegalStateException("Invalid credential record");
+        Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding");
+        cipher.init(Cipher.DECRYPT_MODE, key(), new GCMParameterSpec(128, Base64.decode(parts[0], Base64.NO_WRAP)));
+        cipher.updateAAD(scope.getBytes(StandardCharsets.UTF_8));
+        return new String(cipher.doFinal(Base64.decode(parts[1], Base64.NO_WRAP)), StandardCharsets.UTF_8);
+    }
+    void remove(String scope) { preferences.edit().remove(scope).apply(); }
+    void put(String scope, String credential) throws Exception {
+        Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding");
+        cipher.init(Cipher.ENCRYPT_MODE, key());
+        cipher.updateAAD(scope.getBytes(StandardCharsets.UTF_8));
+        String value = Base64.encodeToString(cipher.getIV(), Base64.NO_WRAP) + ":" +
+                Base64.encodeToString(cipher.doFinal(credential.getBytes(StandardCharsets.UTF_8)), Base64.NO_WRAP);
+        if (!preferences.edit().putString(scope, value).commit()) throw new IllegalStateException("Credential save failed");
+    }
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/SegmentedControl.java

@@ -0,0 +1,73 @@
+package cn.crossdesk.mobile;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.ValueAnimator;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.RectF;
+import android.view.Gravity;
+import android.view.View;
+import android.view.animation.PathInterpolator;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+import java.util.function.IntConsumer;
+
+/** A single sliding selection highlight, matching the iOS segmented settings pickers. */
+@android.annotation.SuppressLint("ViewConstructor") // Programmatic control with labels and a change callback.
+final class SegmentedControl extends LinearLayout {
+    private final Paint paint=new Paint(Paint.ANTI_ALIAS_FLAG);
+    private final RectF highlight=new RectF(), destination=new RectF();
+    private final float radius;
+    private final IntConsumer changed;
+    private int selected;
+    private ValueAnimator animator;
+
+    SegmentedControl(MobileUi ui,String[] titles,int selection,boolean enabled,IntConsumer changed){
+        super(ui.context);this.changed=changed;selected=Math.max(0,Math.min(titles.length-1,selection));
+        int inset=ui.dp(MobileUi.SEGMENT_INSET),height=ui.dp(MobileUi.SEGMENT_HEIGHT)-inset*2;
+        radius=height/2f;
+        setGravity(Gravity.CENTER_VERTICAL);setPadding(inset,inset,inset,inset);setBackground(ui.background(0xFFE9E9EF,MobileUi.SEGMENT_HEIGHT/2));paint.setColor(Color.WHITE);
+        for(int i=0;i<titles.length;i++){
+            final int index=i;TextView choice=ui.action(titles[i],MobileUi.INK,()->select(index));
+            choice.setTextSize(13);choice.setMinHeight(height);choice.setSelected(i==selected);choice.setEnabled(enabled);choice.setAlpha(enabled?1:.45f);
+            addView(choice,new LayoutParams(0,height,1));
+        }
+    }
+
+    private RectF selectedBounds(){View choice=getChildAt(selected);return new RectF(choice.getLeft(),choice.getTop(),choice.getRight(),choice.getBottom());}
+    private void select(int index){
+        if(index==selected)return;
+        setSelection(index);changed.accept(index);
+    }
+    void setSelection(int index){
+        if(index==selected)return;
+        selected=index;for(int i=0;i<getChildCount();i++)getChildAt(i).setSelected(i==selected);
+        cancelAnimation();destination.set(selectedBounds());
+        if(!isAttachedToWindow()||!isLaidOut()||highlight.isEmpty()||!ValueAnimator.areAnimatorsEnabled()){
+            highlight.set(destination);invalidate();
+        }else{
+            // Restart from the displayed position, including when the user reverses mid-animation.
+            RectF start=new RectF(highlight),end=new RectF(destination);ValueAnimator next=ValueAnimator.ofFloat(0,1);animator=next;
+            next.setDuration(200);next.setInterpolator(new PathInterpolator(.25f,.1f,.25f,1));
+            next.addUpdateListener(value->{
+                if(animator!=value)return;float fraction=(float)value.getAnimatedValue();
+                highlight.set(start.left+(end.left-start.left)*fraction,start.top+(end.top-start.top)*fraction,start.right+(end.right-start.right)*fraction,start.bottom+(end.bottom-start.bottom)*fraction);invalidate();
+            });
+            next.addListener(new AnimatorListenerAdapter(){@Override public void onAnimationEnd(Animator value){if(animator==value){animator=null;highlight.set(destination);invalidate();}}});next.start();
+        }
+    }
+    void setOptionsEnabled(boolean enabled){
+        for(int i=0;i<getChildCount();i++){getChildAt(i).setEnabled(enabled);getChildAt(i).setAlpha(enabled?1:.45f);}
+        if(!enabled){cancelAnimation();highlight.set(destination);invalidate();}
+    }
+    private void cancelAnimation(){ValueAnimator old=animator;animator=null;if(old!=null)old.cancel();}
+    @Override protected void onLayout(boolean changed,int left,int top,int right,int bottom){
+        super.onLayout(changed,left,top,right,bottom);RectF bounds=selectedBounds();
+        // Text below the picker can reflow without interrupting an unchanged highlight path.
+        if(!destination.equals(bounds)){cancelAnimation();destination.set(bounds);highlight.set(bounds);}
+    }
+    @Override protected void dispatchDraw(Canvas canvas){canvas.drawRoundRect(highlight,radius,radius,paint);super.dispatchDraw(canvas);}
+    @Override protected void onDetachedFromWindow(){cancelAnimation();highlight.set(destination);super.onDetachedFromWindow();}
+}

apps/android/app/src/main/java/cn/crossdesk/mobile/SessionControls.java

@@ -0,0 +1,200 @@
+package cn.crossdesk.mobile;
+
+import android.content.Context;
+import android.graphics.Color;
+import android.view.*;
+import android.widget.*;
+import static cn.crossdesk.mobile.MobileUi.*;
+
+/** Safe-area overlay: a draggable 54 dp orb, a three-column menu and a floating keyboard. */
+@android.annotation.SuppressLint("ViewConstructor")
+final class SessionControls extends FrameLayout {
+    interface Actions {
+        void disconnect(); void display(); void clipboard(); void key(int code);
+        void chord(int code,int[] modifiers); void shortcut(int code); void text(String value); void mute(); void mouse();
+        void videoSettings(int field,int value);
+    }
+    private final MobileUi ui;
+    private final Actions actions;
+    private final View orb;
+    private final LinearLayout waiting;
+    private View shield;
+    private LinearLayout menu,keyboard;
+    private TextView networkLabel,videoFeedback;
+    private String menuPage="controls";
+    private RemoteNetworkStatistics.Snapshot network=new RemoteNetworkStatistics().snapshot(0);
+    private RemoteVideoSettings settings=new RemoteVideoSettings(1);
+    private final java.util.List<SettingRow> settingRows=new java.util.ArrayList<>();
+    private TextView[][] trafficCells;
+    private LinearLayout[] trafficRows;
+    private TextView[] networkDetails;
+    private View encryptionLock,encryptionOpen;
+    private boolean muted,relative=true,shift,computerKeyboard,orbPositioned;
+    private final java.util.Set<Integer> modifiers=new java.util.LinkedHashSet<>();
+    SessionControls(Context context,MobileUi ui,Actions actions){
+        super(context);this.ui=ui;this.actions=actions;
+        // This container must remain transparent to remote touch outside its controls.
+        waiting=ui.column();waiting.setMinimumWidth(ui.dp(200));waiting.setGravity(Gravity.CENTER);waiting.setPadding(ui.dp(20),ui.dp(20),ui.dp(20),ui.dp(20));waiting.setBackground(ui.background(0xB0202024,14));
+        ProgressBar progress=new ProgressBar(context);progress.setIndeterminateTintList(android.content.res.ColorStateList.valueOf(Color.WHITE));waiting.addView(progress,ui.size(28,28));ui.gap(waiting,12);TextView message=ui.text("等待远端画面…",14,false);message.setTextColor(Color.WHITE);message.setGravity(Gravity.CENTER);waiting.addView(message);addView(waiting,new LayoutParams(-2,-2,Gravity.CENTER));
+        orb=ui.iconButton("display","展开远程控制菜单",()->{if(menu==null)openMenu("controls");else closeMenu();});
+        ImageView brand=new ImageView(context);brand.setImageResource(R.drawable.mobile_brand);brand.setScaleType(ImageView.ScaleType.CENTER_CROP);brand.setBackground(ui.background(Color.WHITE,23));brand.setClipToOutline(true);brand.setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_NO);
+        ((FrameLayout)orb).removeAllViews();((FrameLayout)orb).addView(brand,new LayoutParams(ui.dp(46),ui.dp(46),Gravity.CENTER));
+        orb.setBackground(ui.background(0xFFF5F5F7,27));orb.setElevation(ui.dp(7));addView(orb,new LayoutParams(ui.dp(54),ui.dp(54)));
+        drag(orb,orb,()->{if(menu==null)openMenu("controls");else closeMenu();});
+    }
+    void setRelative(boolean value){relative=value;if(menu!=null&&menuPage.equals("controls"))openMenu("controls");}
+    void setMuted(boolean value){muted=value;if(menu!=null&&menuPage.equals("controls"))openMenu("controls");}
+    void videoSize(int width,int height){waiting.setVisibility(GONE);}
+    void resetVideoStatistics(){statistics(new RemoteNetworkStatistics.Snapshot(network.report,0,0,0,Double.NaN,network.rtt));}
+    void statistics(RemoteNetworkStatistics.Snapshot value){network=value;renderNetwork();}
+    void videoSettings(RemoteVideoSettings value){settings=value;renderVideoSettings();}
+    private void closeMenu(){if(menu!=null){removeView(menu);menu=null;}if(shield!=null){removeView(shield);shield=null;}networkLabel=videoFeedback=null;trafficCells=null;trafficRows=null;networkDetails=null;encryptionLock=encryptionOpen=null;settingRows.clear();orb.setContentDescription("展开远程控制菜单");}
+    private void openMenu(String page){
+        closeMenu();menuPage=page;shield=new View(getContext());shield.setOnClickListener(v->closeMenu());addView(shield,new LayoutParams(-1,-1));
+        menu=ui.column();menu.setPadding(ui.dp(12),ui.dp(12),ui.dp(12),ui.dp(12));ui.card(menu,18);menu.setElevation(ui.dp(12));
+        LinearLayout header=ui.row();
+        if(!page.equals("controls"))header.addView(ui.iconButton("back","返回控制栏",()->openMenu("controls")),ui.size(28,32));
+        LinearLayout titles=ui.column();TextView title=ui.text(page.equals("controls")?"●  已连接":page.equals("video")?"画面设置":"网络状态",14,true);titles.addView(title);
+        if(page.equals("controls")){ui.gap(titles,3);networkLabel=ui.text(network.summary(),10,false);networkLabel.setFontFeatureSettings("tnum");networkLabel.setTextColor(SECONDARY);titles.addView(networkLabel);}header.addView(titles,new LinearLayout.LayoutParams(0,-2,1));header.addView(ui.iconButton("close","关闭控制栏",this::closeMenu),ui.size(30,32));menu.addView(header);ui.gap(menu,9);
+        if(page.equals("video")){videoFeedback=ui.text("",12,false);videoFeedback.setTextColor(SECONDARY);videoFeedback.setPadding(0,0,0,ui.dp(9));menu.addView(videoFeedback);}
+        ScrollView scroll=new ScrollView(getContext());menu.addView(scroll,new LinearLayout.LayoutParams(-1,0,1));LinearLayout body=ui.column();scroll.addView(body);
+        if(page.equals("network")){
+            // Reserve the scrollbar's width plus a gap before right-aligned statistics.
+            scroll.setScrollBarStyle(View.SCROLLBARS_OUTSIDE_INSET);body.setPadding(0,0,ui.dp(6),0);
+        }
+        if(page.equals("controls")){
+            String[] labels={"键盘","显示器","画面设置",muted?"静音":"声音",relative?"相对鼠标":"绝对鼠标","发送文件","网络状态","Ctrl+Alt+Del","剪贴板"};
+            String[] icons={"keyboard","display","sliders","audio","mouse","folder","chart","lock","clipboard"};
+            Runnable[] clicks={()->{closeMenu();toggleKeyboard();},actions::display,()->openMenu("video"),actions::mute,actions::mouse,()->{},()->openMenu("network"),()->{},actions::clipboard};
+            for(int row=0;row<3;row++){LinearLayout line=ui.row();for(int col=0;col<3;col++){int index=row*3+col;LinearLayout control=ui.column();control.setGravity(Gravity.CENTER);control.setBackground(ui.background(0xFFF0F0F2,10));control.addView(ui.icon(icons[index],INK),ui.size(19,19));ui.gap(control,4);TextView caption=ui.text(labels[index],10,false);caption.setSingleLine();caption.setGravity(Gravity.CENTER);control.addView(caption);control.setContentDescription(labels[index]);control.setClickable(true);control.setFocusable(true);control.setOnClickListener(v->clicks[index].run());
+                    if(index==5||index==7){control.setEnabled(false);control.setAlpha(.38f);control.setContentDescription(labels[index]+"，暂不支持");}
+                    LinearLayout.LayoutParams p=new LinearLayout.LayoutParams(0,ui.dp(52),1);if(col>0)p.leftMargin=ui.dp(7);line.addView(control,p);
+                }body.addView(line);if(row<2)ui.gap(body,7);}
+        }else if(page.equals("network")){
+            networkPage(body);
+        }else{
+            settingRows.add(new SettingRow(body,0,"画面质量",new String[]{"低","中","高"},new int[]{0,1,2}));ui.gap(body,12);
+            settingRows.add(new SettingRow(body,1,"画面采集帧率",new String[]{"30 fps","60 fps"},new int[]{30,60}));ui.gap(body,12);
+            settingRows.add(new SettingRow(body,2,"画面偏好",RemoteVideoSettings.PREFERENCES,new int[]{0,1,2}));renderVideoSettings();
+        }
+        ui.gap(menu,9);TextView disconnect=ui.action("断开连接",Color.WHITE,()->{closeMenu();closeKeyboard();actions.disconnect();});disconnect.setMinHeight(ui.dp(34));disconnect.setTextSize(14);disconnect.setBackground(ui.background(RED,8));menu.addView(disconnect,ui.size(-1,34));
+        addView(menu,new LayoutParams(panelWidth(getWidth()),panelHeight(getHeight())));orb.bringToFront();orb.setContentDescription("收起远程控制菜单");
+    }
+    private final class SettingRow {
+        final int field;final int[] values;final SegmentedControl group;
+        SettingRow(LinearLayout body,int field,String title,String[] labels,int[] values){
+            this.field=field;this.values=values;
+            TextView label=ui.text(title,12,false);label.setTextColor(SECONDARY);body.addView(label);ui.gap(body,5);
+            group=new SegmentedControl(ui,labels,selectionIndex(),settings.supported,index->actions.videoSettings(field,values[index]));
+            group.setPadding(ui.dp(2),ui.dp(2),ui.dp(2),ui.dp(2));body.addView(group);
+            for(int i=0;i<labels.length;i++){
+                TextView button=(TextView)group.getChildAt(i);button.setTextSize(12);button.setMinHeight(ui.dp(28));button.setSingleLine();button.setContentDescription(title+"，"+labels[i]);
+                button.setLayoutParams(new LinearLayout.LayoutParams(0,ui.dp(28),1));
+            }
+        }
+        int selectionIndex(){int selected=field==0?settings.selection.quality:field==1?settings.selection.frameRate:settings.selection.preference;
+            for(int i=0;i<values.length;i++)if(values[i]==selected)return i;return 0;
+        }
+        void render(){group.setSelection(selectionIndex());group.setOptionsEnabled(settings.supported);}
+    }
+    private void renderVideoSettings(){
+        if(videoFeedback!=null){String feedback=settings.feedback();videoFeedback.setText(feedback);videoFeedback.setVisibility(feedback.isEmpty()?GONE:VISIBLE);}
+        for(SettingRow row:settingRows)row.render();
+    }
+    private void networkPage(LinearLayout body){
+        trafficCells=new TextView[4][3];trafficRows=new LinearLayout[4];String[] names={"视频","音频","数据","合计"};
+        LinearLayout heading=trafficRow(body,"",new TextView[3],false);((TextView)heading.getChildAt(1)).setText("接收");((TextView)heading.getChildAt(2)).setText("发送");((TextView)heading.getChildAt(3)).setText("丢包率");
+        for(int i=0;i<heading.getChildCount();i++)((TextView)heading.getChildAt(i)).setTextColor(SECONDARY);
+        for(int i=0;i<4;i++)trafficRows[i]=trafficRow(body,names[i],trafficCells[i],i==3);
+        ui.gap(body,10);ui.divider(body);ui.gap(body,10);
+        String[] titles={"帧率","分辨率","画面延时","连接延时（RTT）","连接方式","媒体加密"};networkDetails=new TextView[titles.length];
+        for(int i=0;i<titles.length;i++){LinearLayout row=ui.row();TextView title=ui.text(titles[i],12,false);title.setTextColor(SECONDARY);row.addView(title,new LinearLayout.LayoutParams(0,-2,1));
+            if(i==5){encryptionLock=ui.icon("lock",GREEN);encryptionOpen=ui.icon("unlock",SECONDARY);for(View icon:new View[]{encryptionLock,encryptionOpen}){LinearLayout.LayoutParams p=ui.size(14,14);p.rightMargin=ui.dp(4);row.addView(icon,p);}}
+            TextView value=ui.text("—",12,false);value.setFontFeatureSettings("tnum");row.addView(value);networkDetails[i]=value;body.addView(row);if(i<titles.length-1)ui.gap(body,7);}
+        renderNetwork();
+    }
+    private LinearLayout trafficRow(LinearLayout body,String title,TextView[] cells,boolean total){
+        LinearLayout row=ui.row();row.setPadding(ui.dp(4),ui.dp(5),ui.dp(4),ui.dp(5));body.addView(row);if(total)row.setBackground(ui.background(0x122E7ADB,5));
+        TextView label=ui.text(title,11,total);row.addView(label,ui.size(28,-2));
+        for(int i=0;i<3;i++){TextView cell=ui.text("—",11,total);cell.setGravity(Gravity.END);cell.setSingleLine();cell.setFontFeatureSettings("tnum");cell.setAutoSizeTextTypeUniformWithConfiguration(8,11,1,android.util.TypedValue.COMPLEX_UNIT_SP);
+            LinearLayout.LayoutParams p=i==2?ui.size(46,16):new LinearLayout.LayoutParams(0,ui.dp(16),1);p.leftMargin=ui.dp(4);row.addView(cell,p);cells[i]=cell;}
+        return row;
+    }
+    private void renderNetwork(){
+        if(networkLabel!=null)networkLabel.setText(network.summary());
+        if(trafficCells==null)return;
+        String[] names={"视频","音频","数据","合计"};
+        for(int i=0;i<4;i++){
+            RemoteNetworkStatistics.Traffic traffic=network.report==null?null:network.report.traffic[i];
+            String in=RemoteNetworkStatistics.bitrate(traffic==null?-1:traffic.inbound),out=RemoteNetworkStatistics.bitrate(traffic==null?-1:traffic.outbound),loss=RemoteNetworkStatistics.loss(traffic==null?Double.NaN:traffic.loss);
+            trafficCells[i][0].setText(in);trafficCells[i][1].setText(out);trafficCells[i][2].setText(loss);trafficRows[i].setContentDescription(names[i]+"，接收 "+in+"，发送 "+out+"，丢包率 "+loss);
+        }
+        String[] values={network.fps+" FPS",network.resolution(),RemoteNetworkStatistics.latency(network.latency),RemoteNetworkStatistics.latency(network.rtt),network.mode(),network.report==null?"—":network.report.srtp?"SRTP 已启用":"未启用"};
+        for(int i=0;i<values.length;i++)networkDetails[i].setText(values[i]);networkDetails[5].setTextColor(network.report!=null&&network.report.srtp?GREEN:SECONDARY);
+        encryptionLock.setVisibility(network.report!=null&&network.report.srtp?VISIBLE:GONE);encryptionOpen.setVisibility(network.report!=null&&!network.report.srtp?VISIBLE:GONE);
+    }
+    private int panelWidth(int width){return Math.max(1,Math.min(width-ui.dp(16),Math.max(ui.dp(280),Math.min(ui.dp(340),width-ui.dp(160)))));}
+    private int panelHeight(int height){return Math.min(ui.dp(310),Math.max(1,height-ui.dp(16)));}
+    private void positionMenu(){if(menu==null)return;float ox=orb.getX()+orb.getWidth()/2f;float x=ox>getWidth()/2f?orb.getX()-ui.dp(12)-menu.getWidth():orb.getX()+orb.getWidth()+ui.dp(12);menu.setX(bound(x,ui.dp(8),getWidth()-menu.getWidth()-ui.dp(8)));menu.setY(bound(orb.getY(),ui.dp(8),getHeight()-menu.getHeight()-ui.dp(8)));}
+    private void closeKeyboard(){if(keyboard!=null){removeView(keyboard);keyboard=null;}}
+    private void toggleKeyboard(){if(keyboard!=null){closeKeyboard();modifiers.clear();return;}modifiers.clear();showKeyboard();}
+    private void showKeyboard(){
+        float oldX=keyboard==null?-1:keyboard.getX(),oldY=keyboard==null?-1:keyboard.getY();closeKeyboard();keyboard=ui.column();keyboard.setPadding(ui.dp(5),ui.dp(5),ui.dp(5),ui.dp(5));keyboard.setBackground(ui.background(0xFFD1D6DE,12));keyboard.setElevation(ui.dp(10));
+        LinearLayout top=ui.row();TextView handle=ui.text("━",19,true);handle.setGravity(Gravity.CENTER);handle.setTextColor(SECONDARY);handle.setContentDescription("拖动键盘");top.addView(handle,new LinearLayout.LayoutParams(0,ui.dp(28),1));top.addView(ui.iconButton("close","收起键盘",this::closeKeyboard),ui.size(30,28));keyboard.addView(top);drag(handle,keyboard,()->{});
+        String[][] rows=computerKeyboard?new String[][]{{"Esc","F1","F2","F3","F4","F5","F6"},{"Tab","Ctrl","Alt","Win","↑","⌫"},{"复制","粘贴","全选","←","↓","→"},{"ABC","空格","Enter"}}:new String[][]{{"1","2","3","4","5","6","7","8","9","0"},{"q","w","e","r","t","y","u","i","o","p"},{"a","s","d","f","g","h","j","k","l"},{"⇧","z","x","c","v","b","n","m","⌫"},{"电脑","剪贴板","空格",".","Enter"}};
+        for(String[] values:rows){LinearLayout line=ui.row();for(String value:values){String shown=shift&&value.length()==1?value.toUpperCase(java.util.Locale.ROOT):value;TextView key=ui.action(shown,INK,()->keyboardKey(value));key.setTextSize(value.length()>2?11:14);key.setMinHeight(ui.dp(31));int modifier=value.equals("Ctrl")?17:value.equals("Alt")?18:value.equals("Win")?91:0;key.setBackground(ui.background(modifiers.contains(modifier)?0xFF9BC7F7:value.length()>1||value.equals("⇧")?0xFFAFB8C5:Color.WHITE,5));LinearLayout.LayoutParams p=new LinearLayout.LayoutParams(0,ui.dp(31),value.equals("空格")?3:1);p.setMargins(ui.dp(1.5f),0,ui.dp(1.5f),0);line.addView(key,p);}keyboard.addView(line);ui.gap(keyboard,3);}
+        int width=Math.min(ui.dp(computerKeyboard?520:440),Math.max(1,getWidth()-ui.dp(16)));addView(keyboard,new LayoutParams(width,-2));keyboard.post(()->{if(keyboard!=null){keyboard.setX(oldX<0?(getWidth()-keyboard.getWidth())/2f:oldX);keyboard.setY(oldY<0?getHeight()-keyboard.getHeight()-ui.dp(20):oldY);constrainPanels();}});
+    }
+    private void keyboardKey(String value){
+        switch(value){
+            case "⇧":shift=!shift;showKeyboard();return;
+            case "电脑":computerKeyboard=true;showKeyboard();return;
+            case "ABC":computerKeyboard=false;showKeyboard();return;
+            case "剪贴板":actions.clipboard();return;
+            case "复制":actions.shortcut(0x43);return;case "粘贴":actions.shortcut(0x56);return;case "全选":actions.shortcut(0x41);return;
+            case "空格":sendKey(32);return;case "⌫":sendKey(8);return;case "Enter":sendKey(13);return;case "Esc":sendKey(27);return;case "Tab":sendKey(9);return;
+            case "↑":sendKey(38);return;case "↓":sendKey(40);return;case "←":sendKey(37);return;case "→":sendKey(39);return;
+            // Latch locally; the next key sends a complete chord without leaving remote modifiers down.
+            case "Ctrl":toggleModifier(17);return;case "Alt":toggleModifier(18);return;case "Win":toggleModifier(91);return;
+            default:if(value.matches("F[1-6]")){sendKey(111+Integer.parseInt(value.substring(1)));return;}if(!modifiers.isEmpty())sendKey(KeyMap.ascii(value.charAt(0))&255);else actions.text(shift?value.toUpperCase(java.util.Locale.ROOT):value);
+        }
+    }
+    private void toggleModifier(int code){if(!modifiers.add(code))modifiers.remove(code);showKeyboard();}
+    private void sendKey(int code){if(modifiers.isEmpty())actions.key(code);else{actions.chord(code,modifiers.stream().mapToInt(Integer::intValue).toArray());modifiers.clear();showKeyboard();}}
+    @android.annotation.SuppressLint("ClickableViewAccessibility") // Tap dispatches performClick; dragging is an additional action.
+    private void drag(View handle,View target,Runnable tap){
+        handle.setOnClickListener(v->tap.run());handle.setOnTouchListener(new View.OnTouchListener(){float startX,startY,originX,originY;boolean moved;
+            public boolean onTouch(View v,MotionEvent event){
+                switch(event.getActionMasked()){
+                    case MotionEvent.ACTION_DOWN:startX=event.getRawX();startY=event.getRawY();originX=target.getX();originY=target.getY();moved=false;return true;
+                    case MotionEvent.ACTION_MOVE:float dx=event.getRawX()-startX,dy=event.getRawY()-startY;if(Math.hypot(dx,dy)>ui.dp(4))moved=true;if(moved){if(target==orb)closeMenu();target.setX(bound(originX+dx,ui.dp(8),getWidth()-target.getWidth()-ui.dp(8)));target.setY(bound(originY+dy,ui.dp(8),getHeight()-target.getHeight()-ui.dp(8)));}return true;
+                    case MotionEvent.ACTION_UP:if(!moved)v.performClick();return true;
+                    case MotionEvent.ACTION_CANCEL:return true;
+                    default:return false;
+                }
+            }
+        });
+    }
+    void constrainPanels(){
+        orb.setX(bound(orb.getX(),ui.dp(8),getWidth()-orb.getWidth()-ui.dp(8)));orb.setY(bound(orb.getY(),ui.dp(8),getHeight()-orb.getHeight()-ui.dp(8)));
+        if(menu!=null)requestLayout();
+        if(keyboard!=null){ViewGroup.LayoutParams p=keyboard.getLayoutParams();p.width=Math.min(ui.dp(computerKeyboard?520:440),Math.max(1,getWidth()-ui.dp(16)));keyboard.setLayoutParams(p);keyboard.setX(bound(keyboard.getX(),ui.dp(8),getWidth()-p.width-ui.dp(8)));keyboard.setY(bound(keyboard.getY(),ui.dp(8),getHeight()-keyboard.getHeight()-ui.dp(8)));}
+    }
+    @Override protected void onMeasure(int widthSpec,int heightSpec){
+        super.onMeasure(widthSpec,heightSpec);
+        if(menu!=null){
+            // Use this traversal's viewport, including rotation/inset changes, before drawing.
+            ViewGroup.LayoutParams p=menu.getLayoutParams();int width=panelWidth(getMeasuredWidth()),height=panelHeight(getMeasuredHeight());
+            if(p.width!=width||p.height!=height){p.width=width;p.height=height;super.onMeasure(widthSpec,heightSpec);}
+        }
+    }
+    @Override protected void onLayout(boolean changed,int left,int top,int right,int bottom){
+        super.onLayout(changed,left,top,right,bottom);
+        if(!orbPositioned){orb.setX(Math.max(ui.dp(12),getWidth()-ui.dp(66)));orb.setY(ui.dp(17));orbPositioned=true;}
+        orb.setX(bound(orb.getX(),ui.dp(8),getWidth()-orb.getWidth()-ui.dp(8)));orb.setY(bound(orb.getY(),ui.dp(8),getHeight()-orb.getHeight()-ui.dp(8)));
+        // New/rebuilt menus have real dimensions now; position them in the same frame.
+        positionMenu();
+    }
+    @Override protected void onSizeChanged(int width,int height,int oldWidth,int oldHeight){super.onSizeChanged(width,height,oldWidth,oldHeight);post(this::constrainPanels);}
+    private static float bound(float value,float min,float max){return Math.max(min,Math.min(value,Math.max(min,max)));}
+}

apps/android/app/src/main/res/drawable/ic_check_circle.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="14dp"
+    android:height="14dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FF248A3D"
+        android:fillType="evenOdd"
+        android:pathData="M12,2A10,10 0,1 0,12 22A10,10 0,1 0,12 2Z M6.5,11.5L10.3,15.3L17.5,8.1L16.1,6.7L10.3,12.5L7.9,10.1Z" />
+</vector>

apps/android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,6 @@
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@android:color/white" />
+    <foreground>
+        <inset android:drawable="@drawable/mobile_brand" android:inset="16%" />
+    </foreground>
+</adaptive-icon>

apps/android/app/src/main/res/values/styles.xml

@@ -0,0 +1,9 @@
+<resources>
+    <style name="AppTheme" parent="android:style/Theme.Material.Light.NoActionBar">
+        <item name="android:fontFamily">sans</item>
+        <item name="android:colorAccent">#2E7ADB</item>
+        <item name="android:windowLightStatusBar">true</item>
+        <item name="android:windowActionModeOverlay">true</item>
+        <item name="android:windowBackground">#F2F2F7</item>
+    </style>
+</resources>

apps/android/app/src/main/res/xml/data_extraction_rules.xml

@@ -0,0 +1,14 @@
+<data-extraction-rules>
+    <cloud-backup>
+        <exclude domain="root" path="." />
+        <exclude domain="sharedpref" path="." />
+        <exclude domain="database" path="." />
+        <exclude domain="file" path="." />
+    </cloud-backup>
+    <device-transfer>
+        <exclude domain="root" path="." />
+        <exclude domain="sharedpref" path="." />
+        <exclude domain="database" path="." />
+        <exclude domain="file" path="." />
+    </device-transfer>
+</data-extraction-rules>

apps/android/build.gradle

@@ -0,0 +1 @@
+plugins { id 'com.android.application' version '9.1.0' apply false }

apps/android/gradle.properties

@@ -0,0 +1,2 @@
+org.gradle.jvmargs=-Xmx3g -Dfile.encoding=UTF-8
+android.useAndroidX=true

apps/android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,8 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.3.1-all.zip
+distributionSha256Sum=17f277867f6914d61b1aa02efab1ba7bb439ad652ca485cd8ca6842fccec6e43
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

apps/android/gradlew

@@ -0,0 +1,248 @@
+#!/bin/sh
+
+#
+# Copyright © 2015 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

apps/android/gradlew.bat

@@ -0,0 +1,93 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

apps/android/licenses/OPEN_SOURCE_NOTICE.txt

@@ -0,0 +1,24 @@
+CrossDesk 开源软件权利说明 / Open-source software rights
+
+CrossDesk 按 GNU GPL 第 3 版发布，MiniRTC 按 GNU LGPL 第 3 版发布。
+其他组件适用各自列明的许可证。使用、复制、修改及再分发这些组件的权利，
+以相应许可证为准；本应用的普通使用条款不限制开源许可证授予你的权利。
+许可证中的保证、责任限制及其他条件仍然适用。
+
+“本版本源码与构建说明”提供与发行版本对应的源码入口、子模块信息、
+依赖配方、补丁及构建说明。可以修改相关库后重新构建和链接应用。
+在自己的 Android 设备上运行修改版时，可以使用自己的 Android 签名密钥，
+并按构建文档生成和安装 APK。
+
+CrossDesk is distributed under GNU GPL version 3; MiniRTC is distributed
+under GNU LGPL version 3. Other components are governed by their listed
+licenses. Your rights to use, copy, modify and redistribute those components
+are governed by the applicable licenses. The application's ordinary terms
+of use do not restrict rights granted by those open-source licenses.
+The licenses' warranty, liability and other provisions continue to apply.
+
+The version-specific source and build links identify the application source,
+submodules, dependency recipes, patches and build instructions. You can
+modify the libraries and rebuild and relink the application. Running a
+modified build on your own Android device can use your own Android signing
+key. Build and install the APK as described in the build guide.

apps/android/native/controller_protocol.h

@@ -0,0 +1,35 @@
+/*
+ * @Author: DI JUNKUN
+ * @Date: 2026-10-02
+ * Copyright (c) 2026 by DI JUNKUN, All Rights Reserved.
+ */
+
+#ifndef _CONTROLLER_PROTOCOL_H_
+#define _CONTROLLER_PROTOCOL_H_
+
+#include <minirtc.h>
+#include <nlohmann/json.hpp>
+#include <remote_action.h>
+
+namespace crossdesk::android_controller {
+inline std::string VideoSettingsMessage(int quality, int frame_rate, int preference,
+                                        uint32_t request_id) {
+  RemoteAction action{};
+  action.type = video_settings;
+  action.vs = {quality, frame_rate, preference, request_id, false};
+  return action.to_json();
+}
+
+inline nlohmann::json NetworkReport(const MiniRtcNetTrafficStats& stats, TraversalMode mode) {
+  const auto traffic = [](const MiniRtcInboundStats& in, const MiniRtcOutboundStats& out) {
+    return nlohmann::json{{"inbound", in.bitrate}, {"outbound", out.bitrate}, {"loss", in.loss_rate}};
+  };
+  return {{"rtt", stats.rtt_ms}, {"mode", mode}, {"srtp", stats.srtp_active},
+    {"video", traffic(stats.video_inbound_stats, stats.video_outbound_stats)},
+    {"audio", traffic(stats.audio_inbound_stats, stats.audio_outbound_stats)},
+    {"data", traffic(stats.data_inbound_stats, stats.data_outbound_stats)},
+    {"total", traffic(stats.total_inbound_stats, stats.total_outbound_stats)}};
+}
+}  // namespace crossdesk::android_controller
+
+#endif

apps/android/native/latest_frame_worker.h

@@ -0,0 +1,72 @@
+/*
+ * @Author: DI JUNKUN
+ * @Date: 2026-10-02
+ * Copyright (c) 2026 by DI JUNKUN, All Rights Reserved.
+ */
+
+#ifndef _LATEST_FRAME_WORKER_H_
+#define _LATEST_FRAME_WORKER_H_
+
+#include <condition_variable>
+#include <functional>
+#include <mutex>
+#include <optional>
+#include <thread>
+#include <utility>
+
+namespace crossdesk::android_controller {
+// Rendering may wait for Surface buffers. Never hold up the decoder or build
+// a FIFO of obsolete pictures: keep at most one pending decoded frame.
+template <typename Frame>
+class LatestFrameWorker {
+ public:
+  explicit LatestFrameWorker(std::function<void(Frame)> render)
+      : render_(std::move(render)), thread_([this] { Run(); }) {}
+  ~LatestFrameWorker() { Stop(); }
+  LatestFrameWorker(const LatestFrameWorker&) = delete;
+  LatestFrameWorker& operator=(const LatestFrameWorker&) = delete;
+
+  bool Submit(Frame frame) {
+    std::lock_guard lock(mutex_);
+    if (stopped_) return false;
+    pending_ = std::move(frame);
+    changed_.notify_one();
+    return true;
+  }
+  void Clear() {
+    std::lock_guard lock(mutex_);
+    pending_.reset();
+  }
+  // Called by the session owner, before destroying the peer or Surface.
+  void Stop() {
+    {
+      std::lock_guard lock(mutex_);
+      stopped_ = true;
+      pending_.reset();
+    }
+    changed_.notify_one();
+    if (thread_.joinable()) thread_.join();
+  }
+
+ private:
+  void Run() {
+    for (;;) {
+      std::unique_lock lock(mutex_);
+      changed_.wait(lock, [this] { return stopped_ || pending_.has_value(); });
+      if (stopped_) return;
+      Frame frame = std::move(*pending_);
+      pending_.reset();
+      lock.unlock();
+      render_(std::move(frame));
+    }
+  }
+  const std::function<void(Frame)> render_;
+  std::mutex mutex_;
+  std::condition_variable changed_;
+  std::optional<Frame> pending_;
+  bool stopped_ = false;
+  std::thread thread_;
+};
+}  // namespace crossdesk::android_controller
+
+#endif

apps/android/native/rtc_bridge.cpp

@@ -0,0 +1,429 @@
+#include <jni.h>
+#include <android/native_window_jni.h>
+#include <libyuv.h>
+#include <minirtc.h>
+#include <log.h>
+#include <remote_action.h>
+#include <app_version.h>
+#include <stream_names.h>
+#include <display_stream_id.h>
+#include <nlohmann/json.hpp>
+#include <atomic>
+#include <algorithm>
+#include <cstring>
+#include <memory>
+#include <mutex>
+#include <set>
+#include <string>
+#include <stdexcept>
+#include <vector>
+#include "controller_protocol.h"
+#include "android_codec_support.h"
+#include "latest_frame_worker.h"
+#include "video_picture.h"
+#include "video_timing.h"
+
+namespace {
+using namespace crossdesk;
+using nlohmann::json;
+JavaVM* vm = nullptr;
+struct Environment {
+  JNIEnv* env = nullptr;
+  bool attached = false;
+  Environment() {
+    if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) != JNI_OK) {
+      attached = vm->AttachCurrentThread(&env, nullptr) == JNI_OK;
+    }
+  }
+  ~Environment() { if (attached) vm->DetachCurrentThread(); }
+};
+std::string String(JNIEnv* env, jstring value) {
+  if (!value) return {};
+  const char* bytes = env->GetStringUTFChars(value, nullptr);
+  std::string result = bytes ? bytes : "";
+  if (bytes) env->ReleaseStringUTFChars(value, bytes);
+  return result;
+}
+struct Session;
+using android_controller::VideoPicture;
+void RenderVideo(Session* s, VideoPicture picture);
+struct CallbackContext { Session* owner; bool controller; };
+struct Session {
+  jobject owner = nullptr;
+  jmethodID event_method, audio_method, frame_method;
+  PeerPtr* identity = nullptr;
+  PeerPtr* controller = nullptr;
+  CallbackContext identity_context{this, false}, controller_context{this, true};
+  std::string host, log_path, identity_login, controller_login, remote;
+  int port;
+  std::atomic<bool> stopping{false};
+  std::atomic<uint64_t> signal_generation{0};
+  std::atomic<int> signal_status{-1};
+  std::atomic<int> display{0};
+  std::atomic<bool> surface_ready{false};
+  std::atomic<uint64_t> video_generation{0};
+  std::mutex render_mutex;
+  ANativeWindow* window = nullptr;
+  uint32_t width = 0, height = 0;
+  uint64_t frame_id = 0;
+  std::optional<VideoPicture> surface_picture;
+  void DetachDecoderSurface() {
+    if (surface_picture) surface_picture->RenderSurface(nullptr);
+    surface_picture.reset();
+  }
+  std::set<int> pressed_keys;
+  unsigned pressed_buttons = 0;
+  float pointer_x = .5f, pointer_y = .5f;
+  android_controller::LatestFrameWorker<VideoPicture> renderer{
+      [this](VideoPicture picture) { RenderVideo(this, std::move(picture)); }};
+
+  void Event(int type, const char* data, size_t size) {
+    if (stopping || size > 1024 * 1024) return;
+    Environment scope;
+    if (!scope.env) return;
+    jbyteArray bytes = scope.env->NewByteArray(static_cast<jsize>(size));
+    if (!bytes) return;
+    scope.env->SetByteArrayRegion(bytes, 0, size, reinterpret_cast<const jbyte*>(data));
+    scope.env->CallVoidMethod(owner, event_method, type, bytes);
+    scope.env->DeleteLocalRef(bytes);
+    if (scope.env->ExceptionCheck()) scope.env->ExceptionClear();
+  }
+  void Event(int type, const json& value) {
+    const std::string data = value.dump(); Event(type, data.data(), data.size());
+  }
+  void Send(const char* stream, const std::string& data) {
+    if (controller && !stopping && !data.empty())
+      SendReliableDataFrame(controller, data.data(), data.size(), stream);
+  }
+  void Surface(JNIEnv* env, jobject surface) {
+    std::lock_guard<std::mutex> lock(render_mutex);
+    ++video_generation;
+    renderer.Clear();
+    DetachDecoderSurface();
+    if (window) ANativeWindow_release(window);
+    window = surface ? ANativeWindow_fromSurface(env, surface) : nullptr;
+    surface_ready = window != nullptr;
+    width = height = 0;
+  }
+  ~Session() {
+    // API calls and destruction share the Java RTC executor. Release any
+    // delivered input even when queued Java key-up events were cancelled.
+    if (controller) {
+      for (int key : pressed_keys) {
+        RemoteAction action{}; action.type = keyboard;
+        action.k = {static_cast<size_t>(key), 0, false, key_up};
+        Send(kKeyboardStream, action.to_json());
+      }
+      for (int button = 0; button < 3; ++button) {
+        if (!(pressed_buttons & (1u << button))) continue;
+        RemoteAction action{}; action.type = mouse;
+        action.m = {pointer_x, pointer_y, 0, static_cast<MouseFlag>(2 + button * 2)};
+        Send(kMouseStream, action.to_json());
+      }
+    }
+    stopping = true;
+    renderer.Stop();
+    if (controller) {
+      LeaveConnection(controller, remote.c_str());
+      DestroyPeer(&controller);
+    }
+    if (identity) DestroyPeer(&identity);
+    Environment scope;
+    Surface(scope.env, nullptr);
+    if (scope.env) scope.env->DeleteGlobalRef(owner);
+  }
+};
+
+void Signal(SignalStatus status, const char*, size_t, void* user) {
+  auto* ctx = static_cast<CallbackContext*>(user);
+  if (!ctx->controller && ctx->owner->signal_status.exchange(status) != status)
+    ++ctx->owner->signal_generation;
+  const auto generation = ctx->owner->signal_generation.load();
+  ctx->owner->Event(1, {{"controller", ctx->controller}, {"status", status}, {"generation", generation}});
+}
+void SignalMessage(const char* data, size_t size, void* user) {
+  auto* ctx = static_cast<CallbackContext*>(user);
+  if (ctx->controller || !data || !size || size > 1024 * 1024) return;
+  const auto generation = ctx->owner->signal_generation.load();
+  auto message = json::parse(data, data + size, nullptr, false);
+  if (!message.is_object() || !message.contains("type") || !message["type"].is_string()) return;
+  const auto type = message["type"].get<std::string>();
+  if (type == "announcements" || type == "announcements_changed") ctx->owner->Event(8, data, size);
+  else if (type == "presence" || type == "presence_update") {
+    message["generation"] = generation;
+    ctx->owner->Event(9, message);
+  }
+}
+void Connection(ConnectionStatus status, const char*, size_t, void* user) {
+  auto* ctx = static_cast<CallbackContext*>(user);
+  if (ctx->controller) ctx->owner->Event(2, {{"status", status}});
+}
+void Network(const char* id, size_t size, TraversalMode mode,
+             const MiniRtcNetTrafficStats* stats, const char*, size_t, void* user) {
+  auto* ctx = static_cast<CallbackContext*>(user);
+  if (!ctx->controller && mode == UnknownMode && id && size) {
+    ctx->owner->Event(3, id, size);
+  } else if (ctx->controller && stats) {
+    ctx->owner->Event(7, android_controller::NetworkReport(*stats, mode));
+  }
+}
+void Data(const char* data, size_t size, const char*, size_t,
+          const char* stream, size_t stream_size, void* user) {
+  auto* ctx = static_cast<CallbackContext*>(user);
+  if (!ctx->controller || !data || !stream || size > kMaxClipboardBytes) return;
+  const std::string name(stream, stream_size);
+  if (name == kControlStream) {
+    RemoteAction action{};
+    if (action.from_json(std::string(data, size))) {
+      const auto message = action.to_json();
+      ctx->owner->Event(4, message.data(), message.size());
+      FreeRemoteAction(action);
+    }
+  }
+  if (name == kClipboardStream) ctx->owner->Event(6, data, size);
+}
+void Audio(const char* data, size_t size, const char*, size_t,
+           const char*, size_t, void* user) {
+  auto* ctx = static_cast<CallbackContext*>(user);
+  auto* s = ctx->owner;
+  if (!ctx->controller || s->stopping || !data || !size || size > 23040) return;
+  Environment scope;
+  if (!scope.env) return;
+  auto bytes = scope.env->NewByteArray(size);
+  if (!bytes) return;
+  scope.env->SetByteArrayRegion(bytes, 0, size, reinterpret_cast<const jbyte*>(data));
+  scope.env->CallVoidMethod(s->owner, s->audio_method, bytes);
+  scope.env->DeleteLocalRef(bytes);
+  if (scope.env->ExceptionCheck()) scope.env->ExceptionClear();
+}
+void Video(const MiniRtcVideoFrame* frame, const char*, size_t,
+           const char* stream, size_t stream_size, void* user) {
+  auto* ctx = static_cast<CallbackContext*>(user);
+  auto* s = ctx->owner;
+  const auto generation = s->video_generation.load();
+  if (!ctx->controller || s->stopping || !s->surface_ready || !frame || !stream ||
+      std::string(stream, stream_size) != MakeDisplayStreamId(s->display.load())) return;
+  auto picture = VideoPicture::RetainOrCopy(*frame, generation);
+  if (picture) s->renderer.Submit(std::move(*picture));
+}
+void RenderVideo(Session* s, VideoPicture picture) {
+  const auto w = picture.width, h = picture.height;
+  std::lock_guard<std::mutex> lock(s->render_mutex);
+  if (s->stopping || !s->window || picture.generation != s->video_generation) return;
+  const bool size_changed = s->width != w || s->height != h;
+  if (picture.IsSurface()) {
+    if (picture.RenderSurface(s->window) != 0) return;
+    // Keep a consumed token to detach the codec before Surface destruction,
+    // monitor switching, or CPU rendering after a software fallback.
+    s->surface_picture = picture;
+  } else {
+    const bool was_surface = s->surface_picture.has_value();
+    s->DetachDecoderSurface();
+    if ((size_changed || was_surface) &&
+        ANativeWindow_setBuffersGeometry(s->window, w, h, WINDOW_FORMAT_RGBA_8888) != 0) return;
+    ANativeWindow_Buffer buffer{};
+    if (ANativeWindow_lock(s->window, &buffer, nullptr) != 0) return;
+    const bool rendered = buffer.width == static_cast<int>(w) && buffer.height == static_cast<int>(h) &&
+      libyuv::NV12ToABGR(picture.Y(), picture.YStride(), picture.UV(), picture.UVStride(),
+                       static_cast<uint8_t*>(buffer.bits), buffer.stride * 4, w, h) == 0;
+    if (ANativeWindow_unlockAndPost(s->window) != 0 || !rendered) return;
+  }
+  if (size_changed) {
+    s->width = w; s->height = h;
+    s->Event(5, {{"width", w}, {"height", h}});
+  }
+  // Measure through display submission, using MiniRTC's calibrated capture clock.
+  const auto now = GetSystemTimeMicros(s->controller);
+  const double latency = android_controller::VideoLatencyMilliseconds(
+      picture.captured_us, picture.received_us, now);
+  Environment scope;
+  if (scope.env) {
+    scope.env->CallVoidMethod(s->owner, s->frame_method, static_cast<jlong>(++s->frame_id), latency, static_cast<jint>(w), static_cast<jint>(h));
+    if (scope.env->ExceptionCheck()) scope.env->ExceptionClear();
+  }
+}
+Params Parameters(Session* s, bool controller) {
+  Params p{};
+  std::snprintf(p.signal_server_ip, sizeof(p.signal_server_ip), "%s", s->host.c_str());
+  std::snprintf(p.log_path, sizeof(p.log_path), "%s", s->log_path.c_str());
+  p.signal_server_port = s->port;
+  p.hardware_acceleration = true;
+  // MediaCodec returns retained Surface buffers; software fallback returns
+  // pooled CPU NV12 with the same ownership contract.
+  p.native_video_output = controller;
+  p.turn_mode = TurnAutoUdpTcp;
+  p.enable_srtp = true;
+  p.video_content_type = VideoContentType::ScreenContent;
+  p.video_quality = QualityMedium;
+  p.video_frame_rate = 30;
+  p.video_degradation_preference = VideoDegradationPreference::Balanced;
+  p.on_signal_status = Signal; p.on_connection_status = Connection;
+  p.on_signal_message = SignalMessage;
+  p.on_net_status_report = Network; p.on_receive_data_buffer = Data;
+  p.on_receive_video_frame = Video; p.on_receive_audio_buffer = Audio;
+  p.user_id = (controller ? s->controller_login : s->identity_login).c_str();
+  p.user_data = controller ? &s->controller_context : &s->identity_context;
+  return p;
+}
+Session* From(jlong handle) { return reinterpret_cast<Session*>(handle); }
+} // namespace
+
+extern "C" JNIEXPORT jint JNI_OnLoad(JavaVM* java_vm, void*) {
+  vm = java_vm;
+  minirtc::android::SetJavaVm(java_vm);
+  return JNI_VERSION_1_6;
+}
+#define JNI_METHOD(name) Java_cn_crossdesk_mobile_NativeSession_##name
+extern "C" JNIEXPORT jboolean JNICALL JNI_METHOD(nValidAppVersion)(
+    JNIEnv* env, jclass, jstring version) {
+  return version && env->GetStringUTFLength(version) < 64 &&
+         crossdesk::IsValidAppVersion(String(env, version));
+}
+extern "C" JNIEXPORT jboolean JNICALL JNI_METHOD(nHasAppUpdate)(
+    JNIEnv* env, jclass, jstring version, jbyteArray release_json) {
+  if (!release_json) return false;
+  const auto size = env->GetArrayLength(release_json);
+  if (size <= 0 || size > 256 * 1024) return false;
+  std::string data(size, '\0');
+  env->GetByteArrayRegion(release_json, 0, size, reinterpret_cast<jbyte*>(data.data()));
+  if (env->ExceptionCheck()) return false;
+  const auto latest = crossdesk::ParseVersionInfoJSON(data);
+  return latest && crossdesk::AvailableAppUpdate(String(env, version), *latest).has_value();
+}
+extern "C" JNIEXPORT jlong JNICALL JNI_METHOD(nCreate)(
+    JNIEnv* env, jclass, jobject owner, jstring host, jint port, jstring identity,
+    jstring log_path, jstring certificates) {
+  try {
+    auto s = std::make_unique<Session>();
+    s->owner = env->NewGlobalRef(owner);
+    auto cls = env->GetObjectClass(owner);
+    s->event_method = env->GetMethodID(cls, "onNativeEvent", "(I[B)V");
+    s->audio_method = env->GetMethodID(cls, "onNativeAudio", "([B)V");
+    s->frame_method = env->GetMethodID(cls, "onNativeVideoFrame", "(JDII)V");
+    env->DeleteLocalRef(cls);
+    s->host = String(env, host); s->port = port;
+    s->identity_login = String(env, identity); s->log_path = String(env, log_path);
+    // The bundle is exported from Android's default TrustManager, never the
+    // build machine's certificate store. MiniRTC on Android explicitly
+    // loads this path: OpenSSL's default loader ignores SSL_CERT_FILE in an
+    // Android app process (AT_SECURE=1). Chain and hostname checks stay enabled.
+    const auto bundle = String(env, certificates);
+    if (bundle.empty() || setenv("SSL_CERT_FILE", bundle.c_str(), 1) != 0)
+      throw std::runtime_error("Unable to configure Android trust bundle");
+    // MiniRTC's diagnostic log includes login identities. Keep credentials
+    // solely in Keystore-backed storage; do not persist its session logging.
+    minirtc::InitLogger(s->log_path);
+    minirtc::get_logger()->set_level(spdlog::level::off);
+    auto params = Parameters(s.get(), false);
+    s->identity = CreatePeer(&params);
+    if (!s->identity || Init(s->identity) != 0) return 0;
+    return reinterpret_cast<jlong>(s.release());
+  } catch (const std::exception&) { return 0; }
+}
+extern "C" JNIEXPORT jboolean JNICALL JNI_METHOD(nConnect)(
+    JNIEnv* env, jclass, jlong handle, jstring identity, jstring remote, jstring password) {
+  auto* s = From(handle);
+  if (!s || s->controller) return false;
+  s->controller_login = "C-" + String(env, identity);
+  s->remote = String(env, remote);
+  auto params = Parameters(s, true);
+  s->controller = CreatePeer(&params);
+  if (!s->controller) return false;
+  AddAudioStream(s->controller, kAudioStream);
+  AddDataStream(s->controller, kDataStream, false);
+  for (const char* name : {kMouseStream, kKeyboardStream, kControlStream,
+                          kClipboardStream}) AddDataStream(s->controller, name, true);
+  if (Init(s->controller) != 0) return false;
+  const auto join = s->remote + "@" + String(env, password);
+  return JoinConnection(s->controller, join.c_str()) == 0;
+}
+extern "C" JNIEXPORT void JNICALL JNI_METHOD(nReady)(JNIEnv*, jclass, jlong handle) {
+  auto* s = From(handle); if (!s || !s->controller) return;
+  const std::string info = R"({"type":"client_info","version":"android-native","platform":"android"})";
+  SendSignalMessage(s->controller, info.data(), info.size());
+  auto action = MakeHostInformation("CrossDesk Android", {}, false, "1.6.0", HostPlatform::Android);
+  s->Send(kControlStream, action.to_json()); FreeRemoteAction(action);
+}
+extern "C" JNIEXPORT void JNICALL JNI_METHOD(nPointer)(
+    JNIEnv*, jclass, jlong handle, jfloat x, jfloat y, jint flag, jint wheel) {
+  auto* s = From(handle); if (!s || flag < 0 || flag > 8) return;
+  RemoteAction action{}; action.type = mouse;
+  action.m = {std::clamp(x, 0.f, 1.f), std::clamp(y, 0.f, 1.f), wheel, static_cast<MouseFlag>(flag)};
+  s->pointer_x = action.m.x; s->pointer_y = action.m.y;
+  if (flag >= 1 && flag <= 6) {
+    const unsigned bit = 1u << ((flag - 1) / 2);
+    if (flag & 1) s->pressed_buttons |= bit; else s->pressed_buttons &= ~bit;
+  }
+  s->Send(kMouseStream, action.to_json());
+}
+extern "C" JNIEXPORT void JNICALL JNI_METHOD(nKey)(JNIEnv*, jclass, jlong handle, jint key, jboolean down) {
+  auto* s = From(handle); if (!s) return;
+  RemoteAction action{}; action.type = keyboard;
+  action.k = {static_cast<size_t>(key), 0, false, down ? key_down : key_up};
+  if (down) s->pressed_keys.insert(key); else s->pressed_keys.erase(key);
+  s->Send(kKeyboardStream, action.to_json());
+}
+extern "C" JNIEXPORT void JNICALL JNI_METHOD(nControl)(
+    JNIEnv*, jclass, jlong handle, jint type, jint value) {
+  auto* s = From(handle); if (!s) return;
+  RemoteAction action{};
+  if (type == display_id && value >= 0 && value < 8) {
+    { std::lock_guard<std::mutex> lock(s->render_mutex); s->display = value; ++s->video_generation; s->renderer.Clear(); s->DetachDecoderSurface(); s->width = s->height = 0; }
+    action.type = display_id; action.d = value;
+  } else if (type == audio_capture) {
+    action.type = audio_capture; action.a = value != 0;
+  } else return;
+  s->Send(kControlStream, action.to_json());
+}
+extern "C" JNIEXPORT jboolean JNICALL JNI_METHOD(nVideoSettings)(
+    JNIEnv*, jclass, jlong handle, jint quality, jint rate, jint preference, jlong request_id) {
+  auto* s = From(handle);
+  if (!s || !s->controller || s->stopping || request_id < 0 || request_id > UINT32_MAX) return false;
+  const auto data = android_controller::VideoSettingsMessage(quality, rate, preference, static_cast<uint32_t>(request_id));
+  if (data.empty()) return false;
+  return SendReliableDataFrame(s->controller, data.data(), data.size(), kControlStream) == 0;
+}
+extern "C" JNIEXPORT jboolean JNICALL JNI_METHOD(nAnnouncementRequest)(
+    JNIEnv* env, jclass, jlong handle, jbyteArray data) {
+  auto* s = From(handle);
+  if (!s || !s->identity || s->stopping || !data) return false;
+  const auto size = env->GetArrayLength(data);
+  if (size <= 0 || size > 4096) return false;
+  std::string bytes(size, '\0');
+  env->GetByteArrayRegion(data, 0, size, reinterpret_cast<jbyte*>(bytes.data()));
+  if (env->ExceptionCheck()) return false;
+  auto message = json::parse(bytes, nullptr, false);
+  if (!message.is_object() || !message.contains("type") ||
+      !message["type"].is_string() || message["type"] != "announcements_list") return false;
+  return SendSignalMessage(s->identity, bytes.data(), bytes.size()) == 0;
+}
+extern "C" JNIEXPORT jboolean JNICALL JNI_METHOD(nPresenceRequest)(
+    JNIEnv* env, jclass, jlong handle, jbyteArray data) {
+  auto* s = From(handle);
+  if (!s || !s->identity || s->stopping || !data) return false;
+  const auto size = env->GetArrayLength(data);
+  if (size <= 0 || size > 4096) return false;
+  std::string bytes(size, '\0');
+  env->GetByteArrayRegion(data, 0, size, reinterpret_cast<jbyte*>(bytes.data()));
+  if (env->ExceptionCheck()) return false;
+  auto message = json::parse(bytes, nullptr, false);
+  if (!message.is_object() || !message.contains("type") || !message["type"].is_string() ||
+      message["type"] != "recent_connections_presence" ||
+      !message.contains("user_id") || !message["user_id"].is_string() ||
+      !message.contains("devices") || !message["devices"].is_array() ||
+      !message.contains("subscribe") || message["subscribe"] != true) return false;
+  return SendSignalMessage(s->identity, bytes.data(), bytes.size()) == 0;
+}
+extern "C" JNIEXPORT void JNICALL JNI_METHOD(nClipboard)(
+    JNIEnv* env, jclass, jlong handle, jbyteArray data) {
+  auto* s = From(handle); if (!s || !data) return;
+  const auto size = env->GetArrayLength(data);
+  if (!size || size > static_cast<int>(kMaxClipboardBytes)) return;
+  std::string bytes(size, '\0');
+  env->GetByteArrayRegion(data, 0, size, reinterpret_cast<jbyte*>(bytes.data()));
+  s->Send(kClipboardStream, bytes);
+}
+extern "C" JNIEXPORT void JNICALL JNI_METHOD(nSurface)(JNIEnv* env, jclass, jlong handle, jobject surface) {
+  if (auto* s = From(handle)) s->Surface(env, surface);
+}
+extern "C" JNIEXPORT void JNICALL JNI_METHOD(nDestroy)(JNIEnv*, jclass, jlong handle) { delete From(handle); }

apps/android/native/video_picture.h

@@ -0,0 +1,80 @@
+/*
+ * @Author: DI JUNKUN
+ * @Date: 2026-10-02
+ * Copyright (c) 2026 by DI JUNKUN, All Rights Reserved.
+ */
+
+#ifndef _VIDEO_PICTURE_H_
+#define _VIDEO_PICTURE_H_
+
+#include <minirtc.h>
+#include <climits>
+#include <cstring>
+#include <memory>
+#include <optional>
+#include <vector>
+
+namespace crossdesk::android_controller {
+struct VideoPicture {
+  uint32_t width, height;
+  uint64_t captured_us, received_us, generation;
+  std::vector<uint8_t> pixels;
+  std::shared_ptr<void> native_owner;
+  MiniRtcCpuNv12Frame planes{};
+  MiniRtcAndroidMediaCodecFrame media_codec{};
+
+  bool IsSurface() const { return media_codec.render && native_owner; }
+  int RenderSurface(void* window) const {
+    return IsSurface() ? media_codec.render(native_owner.get(), window) : -1;
+  }
+
+  const uint8_t* Y() const { return native_owner ? planes.y_plane : pixels.data(); }
+  const uint8_t* UV() const { return native_owner ? planes.uv_plane : pixels.data() + size_t(width) * height; }
+  int YStride() const { return native_owner ? planes.y_stride : width; }
+  int UVStride() const { return native_owner ? planes.uv_stride : width; }
+
+  static std::optional<VideoPicture> RetainOrCopy(const MiniRtcVideoFrame& frame,
+                                                uint64_t generation) {
+    const auto w = frame.width, h = frame.height;
+    if (!w || !h || w > 8192 || h > 8192 || (w & 1) || (h & 1) ||
+        static_cast<uint64_t>(w) * h > 33554432) return std::nullopt;
+    VideoPicture result{w, h, frame.captured_timestamp, frame.received_timestamp,
+                        generation, {}, {}, {}, {}};
+    const auto* native = frame.native_frame;
+    const bool valid_native = native && native->struct_size >= sizeof(*native) &&
+        native->width == w && native->height == h && native->owner;
+    if (valid_native && native->type == MiniRtcNativeVideoFrameAndroidMediaCodec &&
+        native->retain && native->release && native->payload.android_media_codec.render) {
+      native->retain(native->owner);
+      result.native_owner = std::shared_ptr<void>(native->owner, native->release);
+      result.media_codec = native->payload.android_media_codec;
+      return result;
+    }
+    if (valid_native && native->type == MiniRtcNativeVideoFrameCpuNv12 &&
+        native->retain && native->release) {
+      const auto& planes = native->payload.cpu_nv12;
+      if (planes.y_plane && planes.uv_plane && planes.y_stride >= w &&
+          planes.uv_stride >= w && planes.y_stride <= INT_MAX && planes.uv_stride <= INT_MAX) {
+        native->retain(native->owner);
+        result.native_owner = std::shared_ptr<void>(native->owner, native->release);
+        result.planes = planes;
+        return result;
+      }
+    }
+    const size_t size = size_t(w) * h * 3 / 2;
+    if (frame.data && frame.size >= size) {
+      result.pixels.resize(size);
+      std::memcpy(result.pixels.data(), frame.data, size);
+    } else if (valid_native && native->copy_to_nv12) {
+      result.pixels.resize(size);
+      if (native->copy_to_nv12(native->owner, result.pixels.data(), size) != 0)
+        return std::nullopt;
+    } else {
+      return std::nullopt;
+    }
+    return result;
+  }
+};
+}  // namespace crossdesk::android_controller
+
+#endif

apps/android/native/video_timing.h

@@ -0,0 +1,27 @@
+/*
+ * @Author: DI JUNKUN
+ * @Date: 2026-10-02
+ * Copyright (c) 2026 by DI JUNKUN, All Rights Reserved.
+ */
+
+#ifndef _VIDEO_TIMING_H_
+#define _VIDEO_TIMING_H_
+
+#include <cstdint>
+
+namespace crossdesk::android_controller {
+inline double VideoLatencyMilliseconds(uint64_t captured_us,
+                                       uint64_t received_us,
+                                       int64_t submitted_us) {
+  // MiniRTC calibrates capture time when the frame is reassembled. Validate
+  // that mapping at reception, not after decoding/Surface waits: a real local
+  // backlog over five seconds must remain visible in the latency measurement.
+  if (!captured_us || received_us < captured_us || submitted_us <= 0 ||
+      received_us > static_cast<uint64_t>(submitted_us) ||
+      received_us - captured_us > 5'000'000)
+    return -1;
+  return (static_cast<uint64_t>(submitted_us) - captured_us) / 1000.0;
+}
+}  // namespace crossdesk::android_controller
+
+#endif

apps/android/native/xmake.lua

@@ -0,0 +1,18 @@
+set_project("crossdesk_android")
+set_languages("c++17")
+add_rules("mode.release", "mode.debug")
+set_policy("package.precompiled", false)
+add_cxflags("-fPIC")
+includes("../../../deps/submodules/minirtc")
+
+target("crossdesk_android")
+    set_kind("shared")
+    add_deps("minirtc")
+    add_packages("nlohmann_json", "libyuv", "spdlog")
+    add_files("rtc_bridge.cpp", "../../../libs/wire/src/remote_action.cpp", "../../../libs/wire/src/app_version.cpp")
+    add_includedirs("../../../deps/submodules/minirtc/src/api", "../../../libs/wire/include")
+    -- This source-level JNI adapter is the only application layer using MiniRTC internals.
+    add_includedirs("../../../deps/submodules/minirtc/src/media/mediacodec")
+    add_syslinks("android", "log")
+    add_shflags("-Wl,-z,max-page-size=16384", "-Wl,-z,common-page-size=16384", {force = true})
+    set_targetdir("../app/build/native/arm64-v8a")

apps/android/scripts/build_native.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+"""Build the native controller in isolation from desktop and iOS caches."""
+import fcntl
+import os
+from pathlib import Path
+import shutil
+import subprocess
+import re
+
+ANDROID = Path(__file__).resolve().parents[1]
+ROOT = ANDROID.parents[1]
+SOURCE = ROOT / 'deps/submodules/minirtc'
+CACHE = ANDROID / '.native'
+PACKAGE_REVISION = 'eda39de3fb99b420c168f1ab9ab2d1791e11b662'
+
+
+def main():
+    sdk = Path(os.environ.get('ANDROID_HOME') or os.environ.get('ANDROID_SDK_ROOT')
+               or Path.home() / 'Library/Android/sdk')
+    ndk = sdk / 'ndk/28.2.13676358'
+    if not ndk.is_dir():
+        raise SystemExit('Install Android NDK 28.2.13676358 using SDK Manager.')
+    bundled = Path.home() / '.cache/crossdesk/toolchains/xmake-3.1.1/xmake'
+    xmake = os.environ.get('XMAKE_BIN') or (str(bundled) if bundled.is_file() else shutil.which('xmake'))
+    if not xmake:
+        raise SystemExit('xmake is required; install it or set XMAKE_BIN.')
+    version = subprocess.check_output([xmake, '--version'], text=True)
+    if not re.search(r'xmake v3\.1\.1(?:\+|[,\s])', version):
+        raise SystemExit('Use Xmake 3.1.1 (set XMAKE_BIN to its executable).')
+    if not (SOURCE / 'xmake.lua').is_file():
+        raise SystemExit('Initialize the MiniRTC submodule before building.')
+    env = os.environ.copy()
+    env['XMAKE_PKG_INSTALLDIR'] = str(CACHE / 'packages')
+    env['XMAKE_GLOBALDIR'] = str(CACHE / 'global')
+    env['ANDROID_NDK_HOME'] = str(ndk)
+    env['ANDROID_NDK_ROOT'] = str(ndk)
+    env['NO_COLOR'] = '1'
+    work = ANDROID / 'native'
+    repository = CACHE / 'global/.xmake/repositories/xmake-repo'
+    if not (repository / '.git').is_dir():
+        subprocess.run([xmake, 'repo', '--update'], cwd=work, env=env, check=True)
+    revision = subprocess.check_output(['git', 'rev-parse', 'HEAD'], cwd=repository, text=True).strip()
+    if revision != PACKAGE_REVISION:
+        subprocess.run(['git', 'fetch', 'origin', PACKAGE_REVISION], cwd=repository, check=True)
+        subprocess.run(['git', 'checkout', '--detach', PACKAGE_REVISION], cwd=repository, check=True)
+    subprocess.run([xmake, 'f', '-P', str(work), '-y', '-p', 'android', '-a', 'arm64-v8a',
+                    '-m', 'release', '--ndk=' + str(ndk), '--ndk_sdkver=26',
+                    '--runtimes=c++_static', '--policies=package.precompiled:n',
+                    '-o', str(CACHE / 'build')], cwd=work, env=env, check=True)
+    subprocess.run([xmake, '-P', str(work), '-y', 'crossdesk_android'], cwd=work, env=env, check=True)
+
+
+if __name__ == '__main__':
+    CACHE.mkdir(parents=True, exist_ok=True)
+    with (CACHE / 'build.lock').open('w') as lock:
+        fcntl.flock(lock, fcntl.LOCK_EX)
+        main()

apps/android/scripts/generate_notices.py

@@ -0,0 +1,132 @@
+#!/usr/bin/env python3
+"""Package existing reviewed notices for the Android runtime dependency set."""
+import json
+import hashlib
+import os
+from pathlib import Path
+import subprocess
+from urllib.parse import quote
+
+ANDROID = Path(__file__).resolve().parents[1]
+ROOT = ANDROID.parents[1]
+COMPONENTS = {
+    'asio', 'concurrentqueue', 'dav1d', 'glib', 'inih', 'nlohmann_json',
+    'kcp', 'libdatachannel', 'libffi', 'libnice', 'libsrtp', 'libyuv',
+    'minirtc', 'openfec', 'openssl3', 'libopus', 'pcre2', 'plog',
+    'proxy-libintl', 'spdlog', 'svt-av1', 'usrsctp', 'webrtc', 'websocketpp', 'zlib',
+}
+
+
+def git(*args, cwd=ROOT):
+    return subprocess.check_output(['git', *args], cwd=cwd, text=True).strip()
+
+
+def write_pages(output, catalog, additional, revision, minirtc):
+    """Small navigation catalog and separate, offline-selectable license documents."""
+    source = f'https://github.com/kunkundi/crossdesk/tree/{revision}'
+    mini_source = f'https://github.com/kunkundi/minirtc/tree/{minirtc}'
+    components = []
+    for entry in catalog['components']:
+        if entry['id'] not in COMPONENTS | {'crossdesk'}:
+            continue
+        component = dict(entry)
+        if component['id'] == 'crossdesk':
+            component['sourceURL'] = source
+            component['documents'] = [
+                {'title': 'LICENSE', 'text': (ROOT / 'LICENSE').read_text()},
+                {'title': 'apps/android/licenses/OPEN_SOURCE_NOTICE.txt',
+                 'text': (ANDROID / 'licenses/OPEN_SOURCE_NOTICE.txt').read_text()},
+            ]
+        if component['id'] in {'minirtc', 'inih', 'webrtc'}:
+            component.update(version=minirtc, sourceURL=mini_source)
+        if '/thirdparty/' in component.get('buildSourceURL', ''):
+            recipe = component['buildSourceURL'].split('/thirdparty/', 1)[1]
+            component['buildSourceURL'] = f'{mini_source}/thirdparty/{recipe}'
+        components.append(component)
+    components += additional
+    # Ship the actual build instructions and recipes used by this local build. The Android
+    # directory may not exist at the public base commit of an unpublished checkout.
+    bundled = [
+        ('构建说明', ANDROID / 'README.md'),
+        ('原生构建配方', ANDROID / 'native/xmake.lua'),
+        ('OpenSSL 构建配方', ROOT / 'deps/submodules/minirtc/thirdparty/openssl/xmake.lua'),
+        ('MiniRTC 构建配方', ROOT / 'deps/submodules/minirtc/xmake.lua'),
+        ('原生构建脚本', ANDROID / 'scripts/build_native.py'),
+        ('SVT-AV1 构建配方', ROOT / 'deps/submodules/minirtc/thirdparty/svt-av1/xmake.lua'),
+    ]
+    build_documents = []
+    for index, (title, path) in enumerate(bundled):
+        asset = f'about/build/{index}.txt'
+        target = output / asset
+        target.parent.mkdir(parents=True, exist_ok=True)
+        target.write_text(path.read_text(), encoding='utf-8')
+        build_documents.append({'title': title, 'asset': asset})
+    for component in components:
+        if component['id'] in {'minirtc', 'glib', 'libnice', 'openfec', 'openh264', 'openssl3', 'svt-av1'}:
+            component['buildDocuments'] = build_documents[1:]
+        documents = []
+        for index, document in enumerate(component['documents']):
+            asset = f"about/licenses/{component['id']}/{index}.txt"
+            target = output / asset
+            target.parent.mkdir(parents=True, exist_ok=True)
+            target.write_text(document['text'], encoding='utf-8')
+            documents.append({'title': document['title'], 'asset': asset,
+                              'sha256': hashlib.sha256(document['text'].encode('utf-8')).hexdigest()})
+        component['documents'] = documents
+    (output / 'ThirdPartyLicenses.json').write_text(json.dumps(
+        {'schemaVersion': 1, 'components': components}, ensure_ascii=False, indent=2)+'\n', encoding='utf-8')
+    tags = git('tag', '--points-at', 'HEAD').splitlines()
+    tag = os.environ.get('CROSSDESK_SOURCE_TAG')
+    if tag and tag not in tags:
+        raise ValueError(f'Source tag {tag!r} does not point to the build commit')
+    if not tag:
+        versions = sorted(value for value in tags if value.startswith(('v', 'android-v')))
+        tag = versions[0] if versions else None
+    dirty = bool(git('status', '--porcelain', '--untracked-files=normal', '--ignore-submodules=none'))
+    if os.environ.get('CROSSDESK_RELEASE_BUILD') == 'YES' and (dirty or not tag or not tag.startswith(('v', 'android-v'))):
+        raise ValueError('Release source must be a clean checkout of a version tag, with matching submodules')
+    metadata = {
+        'schemaVersion': 1, 'revision': revision, 'tag': tag,
+        'isModified': dirty,
+        'sourceURL': source,
+        'buildInstructionsURL': f'https://github.com/kunkundi/crossdesk/blob/{quote(revision, safe="")}/apps/android/README.md',
+        'buildDocuments': build_documents, 'miniRTCRevision': minirtc,
+    }
+    (output / 'SourceMetadata.json').write_text(json.dumps(metadata, ensure_ascii=False, indent=2)+'\n', encoding='utf-8')
+
+
+def main():
+    output = ANDROID / 'app/build/generated/notices'
+    output.mkdir(parents=True, exist_ok=True)
+    (output / 'PRIVACY.md').write_text((ROOT / 'PRIVACY.md').read_text(encoding='utf-8'), encoding='utf-8')
+    catalog = json.loads((ROOT / 'apps/ios/CrossDeskMobile/Resources/ThirdPartyLicenses.json').read_text())
+    revision = subprocess.check_output(['git', 'rev-parse', 'HEAD'], cwd=ROOT, text=True).strip()
+    minirtc = subprocess.check_output(['git', 'rev-parse', 'HEAD'], cwd=ROOT / 'deps/submodules/minirtc', text=True).strip()
+    parts = [
+        'CrossDesk Android — open-source notices\n',
+        'CrossDesk: GPL-3.0-only; MiniRTC: LGPL-3.0-only. Other components retain their own licenses.\n'
+        'Open-source licenses govern use, modification and redistribution; their warranty limitations apply.\n'
+        'You can rebuild/relink modified libraries and install an APK signed with your own key.\n',
+        f'Application base revision: {revision}\nMiniRTC base revision: {minirtc}\n'
+        'This development build may contain local changes in CrossDesk and the MiniRTC submodule.\n'
+        'Source: https://github.com/kunkundi/crossdesk\n'
+        'Build: apps/android/README.md; native source: deps/submodules/minirtc\n',
+        (ROOT / 'LICENSE').read_text(),
+    ]
+    for component in catalog['components']:
+        if component['id'] not in COMPONENTS:
+            continue
+        parts.append(f"\n{component['name']} — {component['license']}\n{component['sourceURL']}\n")
+        for document in component['documents']:
+            parts.extend([document['title'], document['text']])
+    additional = json.loads((ANDROID / 'licenses/additional-notices.json').read_text())
+    for component in additional:
+        parts.append(component['name']+' '+component['version'])
+        for document in component['documents']:
+            parts.extend([document['title'], document['text']])
+    (output / 'THIRD_PARTY_NOTICES.txt').write_text('\n\n'.join(parts), encoding='utf-8')
+    write_pages(output, catalog, additional, revision, minirtc)
+
+
+if __name__ == '__main__':
+    main()

apps/android/settings.gradle

@@ -0,0 +1,7 @@
+pluginManagement { repositories { google(); mavenCentral(); gradlePluginPortal() } }
+dependencyResolutionManagement {
+    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
+    repositories { google(); mavenCentral() }
+}
+rootProject.name = 'CrossDeskAndroid'
+include ':app'

apps/android/test/android/assets/tls/root.pem

@@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

apps/android/test/android/java/cn/crossdesk/mobile/AnnouncementInboxTest.java

@@ -0,0 +1,71 @@
+package cn.crossdesk.mobile;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import org.json.*;
+import org.junit.*;
+import java.io.File;
+import java.nio.file.Files;
+import java.util.*;
+import java.util.concurrent.FutureTask;
+import static org.junit.Assert.*;
+
+public class AnnouncementInboxTest {
+    private AnnouncementInbox inbox;
+    private File directory;
+    private final ArrayDeque<JSONObject> sent=new ArrayDeque<>();
+    private interface Checked { void run() throws Exception; }
+    private void main(Checked action)throws Exception {
+        FutureTask<Void> task=new FutureTask<>(()->{action.run();return null;});
+        InstrumentationRegistry.getInstrumentation().runOnMainSync(task);task.get();
+    }
+    @Before public void setup()throws Exception {
+        directory=Files.createTempDirectory(InstrumentationRegistry.getInstrumentation().getTargetContext().getCacheDir().toPath(),"announcements-").toFile();
+        main(()->{inbox=new AnnouncementInbox(directory);inbox.sender=(message,id)->sent.add(message);inbox.configure("Example.test.",9099,"123456789");inbox.setConnected(true);});
+    }
+    @After public void cleanup()throws Exception {
+        main(()->inbox.close());
+        try(var paths=Files.walk(directory.toPath())){for(var path:paths.sorted(Comparator.reverseOrder()).toList())Files.delete(path);}
+    }
+    private static JSONObject answer(JSONObject request,int count,long revision)throws Exception {
+        int offset=request.getInt("offset");boolean summary=request.getBoolean("summary_only");JSONArray items=new JSONArray();
+        for(int i=offset;i<Math.min(count,offset+(summary?200:20));i++){
+            JSONObject item=new JSONObject().put("id",i+1).put("revision",revision);
+            if(!summary)item.put("title",i==0?"欢迎使用 CrossDesk":"公告 "+(i+1)).put("body","安卓公告与 iOS 保持一致。\n\n访问 [CrossDesk 官网](https://crossdesk.cn) 了解更多。\n支持中文、换行与网页链接。").put("updated_at",1790812800L);
+            items.put(item);
+        }
+        return new JSONObject().put("type","announcements").put("request_id",request.getString("request_id"))
+            .put("summary_only",summary).put("offset",offset).put("total",count).put("catalog_revision",revision).put("items",items);
+    }
+    private void drain(int count,long revision)throws Exception {
+        int limit=100;while(!sent.isEmpty()){assertTrue("Request loop",limit-->0);inbox.receive(answer(sent.remove(),count,revision));}
+    }
+    @Test public void summariesCountAllUnreadAndBodiesPageInTwenties()throws Exception {main(()->{
+        JSONObject first=sent.remove();inbox.receive(answer(first,203,1));assertEquals(200,sent.peek().getInt("offset"));assertEquals(0,inbox.items.size());
+        inbox.receive(answer(sent.remove(),203,1));assertEquals(203,inbox.unread);assertFalse(sent.peek().getBoolean("summary_only"));
+        drain(203,1);assertEquals(20,inbox.items.size());assertEquals(203,inbox.total);assertFalse(inbox.loading);assertTrue(inbox.loaded);
+        inbox.loadMore();assertEquals(20,sent.peek().getInt("offset"));drain(203,1);assertEquals(40,inbox.items.size());
+    });}
+    @Test public void readAndDeletePersistPerRevisionAndScope()throws Exception {main(()->{
+        drain(3,1);inbox.markRead(inbox.items.get(0));inbox.dismiss(inbox.items.get(1));assertEquals(1,inbox.unread);assertEquals(2,inbox.total);
+        inbox.close();inbox=new AnnouncementInbox(directory);inbox.sender=(message,id)->sent.add(message);
+        inbox.configure("example.TEST",9099,"123456789");inbox.setConnected(true);drain(3,1);
+        assertEquals(2,inbox.items.size());assertTrue(inbox.items.get(0).read);assertEquals(1,inbox.unread);
+        inbox.refresh();drain(3,2);assertEquals(3,inbox.total);assertEquals(3,inbox.unread);assertEquals(3,inbox.items.size());
+        inbox.configure("other.test",9099,"123456789");drain(3,1);assertEquals(3,inbox.unread);
+        inbox.configure("example.test",9099,"different-device");drain(3,1);assertEquals(3,inbox.unread);
+        inbox.configure("example.test",9999,"123456789");drain(3,1);assertEquals(3,inbox.unread);
+        inbox.configure("example.test",9099,"123456789");drain(3,1);assertEquals(1,inbox.unread);
+    });}
+
+    @Test public void malformedResponseFailsWithoutLosingVisibleRowsAndCanRetry()throws Exception {main(()->{
+        drain(2,1);inbox.refresh();JSONObject invalid=answer(sent.remove(),2,1);invalid.put("total","2");inbox.receive(invalid);
+        assertTrue(inbox.failed);assertFalse(inbox.loading);assertEquals(2,inbox.items.size());
+        inbox.refresh();drain(2,2);assertFalse(inbox.failed);
+        inbox.refresh();JSONObject summary=answer(sent.remove(),2,3);summary.getJSONArray("items").getJSONObject(1).put("id",1);inbox.receive(summary);
+        assertTrue(inbox.failed);inbox.refresh();drain(2,3);assertFalse(inbox.failed);
+        inbox.refresh();inbox.receive(answer(sent.remove(),2,4));JSONObject body=answer(sent.remove(),2,4);
+        body.getJSONArray("items").getJSONObject(0).put("body","中".repeat(2667));inbox.receive(body);assertTrue(inbox.failed);assertEquals(0,inbox.items.size());
+        inbox.refresh();drain(2,4);assertFalse(inbox.failed);
+    });}
+
+}

apps/android/test/android/java/cn/crossdesk/mobile/ControllerTest.java

@@ -0,0 +1,120 @@
+package cn.crossdesk.mobile;
+
+import android.content.Context;
+import android.view.KeyEvent;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.platform.app.InstrumentationRegistry;
+import org.json.JSONObject;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import java.lang.reflect.Field;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.TimeUnit;
+import static org.junit.Assert.*;
+
+@RunWith(AndroidJUnit4.class)
+public class ControllerTest {
+
+    @Test public void presenceCallbacksRejectDisconnectedAndPreviousSignalingGeneration()throws Exception{
+        var instrumentation=InstrumentationRegistry.getInstrumentation();
+        var delivered=new java.util.concurrent.atomic.AtomicInteger();
+        NativeSession.Listener listener=new NativeSession.Listener(){
+            public void status(String value){}public void connected(){}public void ended(String reason){}
+            public void data(JSONObject value){}public void videoSize(int width,int height){}public void clipboard(String value){}public void statistics(RemoteNetworkStatistics.Snapshot value){}
+            public void presence(JSONObject value){delivered.incrementAndGet();}
+        };
+        NativeSession session=new NativeSession(instrumentation.getTargetContext(),"127.0.0.1",1,"","",listener);
+        Field workerField=NativeSession.class.getDeclaredField("RTC"),requestedField=NativeSession.class.getDeclaredField("presenceRequested");workerField.setAccessible(true);requestedField.setAccessible(true);
+        ExecutorService worker=(ExecutorService)workerField.get(null);
+        var event=NativeSession.class.getDeclaredMethod("onNativeEvent",int.class,byte[].class);event.setAccessible(true);
+        java.util.function.BiConsumer<Integer,String> send=(type,json)->{
+            try{event.invoke(session,type,json.getBytes(java.nio.charset.StandardCharsets.UTF_8));}catch(Exception error){throw new RuntimeException(error);}
+        };
+        try{
+            send.accept(1,"{\"controller\":false,\"status\":1,\"generation\":1}");
+            worker.submit(()->{requestedField.setBoolean(session,true);return null;}).get(5,TimeUnit.SECONDS);
+            send.accept(9,"{\"type\":\"presence\",\"devices\":[],\"generation\":1}");
+            worker.submit(()->{}).get(5,TimeUnit.SECONDS);instrumentation.waitForIdleSync();assertEquals(1,delivered.get());
+            send.accept(1,"{\"controller\":false,\"status\":4,\"generation\":2}");
+            send.accept(9,"{\"type\":\"presence\",\"devices\":[],\"generation\":1}");
+            send.accept(1,"{\"controller\":false,\"status\":1,\"generation\":3}");
+            worker.submit(()->{requestedField.setBoolean(session,true);return null;}).get(5,TimeUnit.SECONDS);
+            send.accept(9,"{\"type\":\"presence\",\"devices\":[],\"generation\":1}");
+            worker.submit(()->{}).get(5,TimeUnit.SECONDS);instrumentation.waitForIdleSync();assertEquals(1,delivered.get());
+            send.accept(1,"{\"controller\":false,\"status\":1,\"generation\":3}");
+            send.accept(9,"{\"type\":\"presence_update\",\"id\":\"123456789\",\"online\":true,\"generation\":3}");
+            worker.submit(()->{}).get(5,TimeUnit.SECONDS);instrumentation.waitForIdleSync();assertEquals("Repeated login readiness keeps the current subscription",2,delivered.get());
+        }finally{session.close();worker.submit(()->{}).get(5,TimeUnit.SECONDS);}
+    }
+
+    @Test public void repeatedNativeConnectedEventsNotifyAndInitializeOnlyOnce()throws Exception{
+        var instrumentation=InstrumentationRegistry.getInstrumentation();
+        var notifications=new java.util.concurrent.atomic.AtomicInteger();
+        NativeSession.Listener listener=new NativeSession.Listener(){
+            public void status(String value){}public void connected(){notifications.incrementAndGet();}public void ended(String reason){}
+            public void data(JSONObject value){}public void videoSize(int width,int height){}public void clipboard(String value){}public void statistics(RemoteNetworkStatistics.Snapshot value){}
+        };
+        NativeSession session=new NativeSession(instrumentation.getTargetContext(),"127.0.0.1",1,"123456789","test",listener);
+        Field workerField=NativeSession.class.getDeclaredField("RTC"),audioField=NativeSession.class.getDeclaredField("audio");workerField.setAccessible(true);audioField.setAccessible(true);
+        ExecutorService worker=(ExecutorService)workerField.get(null);
+        var event=NativeSession.class.getDeclaredMethod("onNativeEvent",int.class,byte[].class);event.setAccessible(true);
+        byte[] connected="{\"status\":1}".getBytes(java.nio.charset.StandardCharsets.UTF_8);
+        try{
+            // Exercise the Java native-callback path without starting a network peer.
+            event.invoke(session,2,connected);Object audio=worker.submit(()->audioField.get(session)).get(5,TimeUnit.SECONDS);
+            instrumentation.waitForIdleSync();assertEquals(1,notifications.get());assertNotNull(audio);
+            event.invoke(session,2,connected);event.invoke(session,2,connected);
+            assertSame("Duplicate readiness must not replace the audio player",audio,worker.submit(()->audioField.get(session)).get(5,TimeUnit.SECONDS));
+            instrumentation.waitForIdleSync();assertEquals("One desktop connection must notify the UI only once",1,notifications.get());
+        }finally{session.close();worker.submit(()->{}).get(5,TimeUnit.SECONDS);}
+    }
+    @Test public void keyboardSupportsDesktopVirtualKeys() {
+        assertEquals(0x41, KeyMap.windowsCode(KeyEvent.KEYCODE_A));
+        assertEquals(0x2E, KeyMap.windowsCode(KeyEvent.KEYCODE_FORWARD_DEL));
+        assertEquals(0x11, KeyMap.windowsCode(KeyEvent.KEYCODE_CTRL_LEFT));
+        assertEquals(0x5B, KeyMap.windowsCode(KeyEvent.KEYCODE_META_LEFT));
+        assertEquals(0xDB | 0x100, KeyMap.ascii('{'));
+        assertEquals(0x31 | 0x100, KeyMap.ascii('!'));
+        assertEquals(0, KeyMap.ascii('中'));
+    }
+
+    @Test public void credentialsRemainEncryptedAndServerScoped() throws Exception {
+        Context context = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        SecretStore store = new SecretStore(context);
+        String scope = "instrumentation.invalid:9099";
+        try {
+            store.put(scope, "test-id@temporary-test-password");
+            assertEquals("test-id@temporary-test-password", store.get(scope));
+            assertEquals("", store.get("instrumentation.invalid:9100"));
+            String persisted = context.getSharedPreferences("identities", Context.MODE_PRIVATE).getString(scope, "");
+            assertFalse(persisted.contains("temporary-test-password"));
+        } finally {
+            context.getSharedPreferences("identities", Context.MODE_PRIVATE).edit().remove(scope).commit();
+        }
+    }
+
+    @Test public void nativePeerCanStartAndCancelRepeatedly() throws Exception {
+        Context context = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        Field workerField = NativeSession.class.getDeclaredField("RTC"); workerField.setAccessible(true);
+        ExecutorService worker = (ExecutorService) workerField.get(null);
+        Field handleField = NativeSession.class.getDeclaredField("handle"); handleField.setAccessible(true);
+        NativeSession.Listener listener = new NativeSession.Listener() {
+            public void status(String value) { }
+            public void connected() { fail("Loopback port 1 must not establish a session"); }
+            public void ended(String reason) { }
+            public void data(JSONObject data) { }
+            public void videoSize(int width, int height) { }
+            public void clipboard(String value) { }
+            public void statistics(RemoteNetworkStatistics.Snapshot value) { }
+        };
+        for (int i = 0; i < 3; i++) {
+            NativeSession session = new NativeSession(context, "127.0.0.1", 1, "invalid", "test", listener);
+            session.start();
+            assertTrue(worker.submit(() -> handleField.getLong(session)).get(15, TimeUnit.SECONDS) != 0);
+            session.surface(null);
+            session.close(); session.close();
+            assertEquals(0L, (long) worker.submit(() -> handleField.getLong(session)).get(15, TimeUnit.SECONDS));
+        }
+    }
+
+}

apps/android/test/android/java/cn/crossdesk/mobile/NetworkStatisticsTest.java

@@ -0,0 +1,24 @@
+package cn.crossdesk.mobile;
+
+import org.json.JSONObject;
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+public class NetworkStatisticsTest {
+    static JSONObject report(int mode,boolean srtp,double rtt)throws Exception{
+        return new JSONObject().put("mode",mode).put("srtp",srtp).put("rtt",rtt).put("video",traffic(8000000,0,.02)).put("audio",traffic(64000,0,.01)).put("data",traffic(2000,3000,.03)).put("total",traffic(8066000,3000,.06));
+    }
+    private static JSONObject traffic(long in,long out,double loss)throws Exception{return new JSONObject().put("inbound",in).put("outbound",out).put("loss",loss);}
+
+    @Test public void staleReportsAndRttExpireIndependently()throws Exception{
+        RemoteNetworkStatistics state=new RemoteNetworkStatistics();state.receive(new RemoteNetworkStatistics.Report(report(0,true,20)),10);state.receive(new RemoteNetworkStatistics.Report(report(0,true,100)),11);assertEquals(40,state.snapshot(11).rtt,.0001);
+        for(double invalid:new double[]{-1,2001})state.receive(new RemoteNetworkStatistics.Report(report(0,true,invalid)),12);
+        assertEquals(40,state.snapshot(13.99).rtt,.0001);assertTrue(Double.isNaN(state.snapshot(14).rtt));assertNotNull(state.snapshot(14).report);assertNull(state.snapshot(15).report);
+        state.receive(new RemoteNetworkStatistics.Report(report(0,true,0)),16);assertEquals(0,state.snapshot(16).rtt,0);
+    }
+    @Test public void submittedFramesAreCountedOnceAndIdleVideoExpires(){
+        RemoteNetworkStatistics state=new RemoteNetworkStatistics();state.frame(1,100,1920,1080,10);state.frame(1,100,1920,1080,10.1);state.frame(2,200,1920,1080,10.2);
+        assertEquals(2,state.snapshot(10.3).fps);assertEquals(150,state.snapshot(10.3).latency,.0001);assertEquals("1920 × 1080",state.snapshot(10.3).resolution());assertEquals(1,state.snapshot(11).fps);assertEquals(0,state.snapshot(11.3).fps);assertTrue(Double.isNaN(state.snapshot(11.3).latency));
+    }
+
+}

apps/android/test/android/java/cn/crossdesk/mobile/PrivacyConsentTest.java

@@ -0,0 +1,145 @@
+package cn.crossdesk.mobile;
+
+import android.app.Dialog;
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.CheckBox;
+import android.widget.TextView;
+import androidx.lifecycle.Lifecycle;
+import androidx.test.core.app.ActivityScenario;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.platform.app.InstrumentationRegistry;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import java.util.Map;
+
+import static org.junit.Assert.*;
+
+@RunWith(AndroidJUnit4.class)
+public class PrivacyConsentTest {
+    private SharedPreferences preferences;
+    private Map<String,?> saved;
+
+    @Before public void prepare(){
+        Context context=InstrumentationRegistry.getInstrumentation().getTargetContext();
+        preferences=context.getSharedPreferences("settings",Context.MODE_PRIVATE);saved=preferences.getAll();
+        preferences.edit().remove("networkConsent").putString("host","127.0.0.1").putInt("port",1).commit();
+    }
+    @After public void restore(){
+        SharedPreferences.Editor edit=preferences.edit();
+        for(String key:new String[]{"networkConsent","host","port"}){
+            edit.remove(key);Object value=saved.get(key);
+            if(value instanceof Boolean)edit.putBoolean(key,(Boolean)value);
+            else if(value instanceof String)edit.putString(key,(String)value);
+            else if(value instanceof Integer)edit.putInt(key,(Integer)value);
+        }
+        edit.commit();
+    }
+    private static Object field(MainActivity activity,String name){
+        try{var field=MainActivity.class.getDeclaredField(name);field.setAccessible(true);return field.get(activity);}
+        catch(Exception error){throw new AssertionError(error);}
+    }
+    private static Dialog notice(MainActivity activity){
+        Dialog dialog=(Dialog)field(activity,"privacyDialog");assertNotNull("An unconsented visit must prompt",dialog);assertTrue(dialog.isShowing());return dialog;
+    }
+    private static TextView findText(View view,String text){
+        if(view instanceof TextView&&((TextView)view).getText().toString().equals(text))return (TextView)view;
+        if(view instanceof ViewGroup){ViewGroup parent=(ViewGroup)view;for(int i=0;i<parent.getChildCount();i++){TextView found=findText(parent.getChildAt(i),text);if(found!=null)return found;}}
+        return null;
+    }
+    private static TextView action(Dialog dialog,String text){
+        TextView view=findText(dialog.getWindow().getDecorView(),text);assertNotNull(text,view);return view;
+    }
+    private static void decline(MainActivity activity){action(notice(activity),"暂不同意").performClick();}
+    private static void agree(MainActivity activity){
+        Dialog dialog=notice(activity);action(dialog,"我已阅读并同意《隐私政策》").performClick();action(dialog,"同意并继续").performClick();
+    }
+
+    @Test public void coldLaunchRequiresExplicitAgreementBeforeNetworking(){
+        try(ActivityScenario<MainActivity> scenario=ActivityScenario.launch(MainActivity.class)){
+            scenario.onActivity(activity->{
+                Dialog dialog=notice(activity);
+                assertFalse(((CheckBox)action(dialog,"我已阅读并同意《隐私政策》")).isChecked());
+                assertFalse(action(dialog,"同意并继续").isEnabled());
+                action(dialog,"同意并继续").performClick();
+                assertTrue(dialog.isShowing());assertFalse(preferences.getBoolean("networkConsent",false));
+                assertNull(field(activity,"signaling"));
+                decline(activity);assertFalse(dialog.isShowing());assertNull(field(activity,"signaling"));
+                assertNotNull(findText(activity.getWindow().getDecorView(),"等待隐私授权"));
+            });
+            scenario.onActivity(activity->assertNull(field(activity,"privacyDialog")));
+        }
+    }
+    @Test public void refusalPromptsOnBackgroundReturnButNotTransientInactivity(){
+        try(ActivityScenario<MainActivity> scenario=ActivityScenario.launch(MainActivity.class)){
+            scenario.onActivity(PrivacyConsentTest::decline);
+            scenario.moveToState(Lifecycle.State.STARTED).moveToState(Lifecycle.State.RESUMED);
+            scenario.onActivity(activity->{assertNull(field(activity,"privacyDialog"));assertNull(field(activity,"signaling"));});
+            for(int visit=0;visit<3;visit++){
+                scenario.moveToState(Lifecycle.State.CREATED).moveToState(Lifecycle.State.RESUMED);
+                scenario.onActivity(activity->{notice(activity);assertNull(field(activity,"signaling"));decline(activity);});
+            }
+        }
+        try(ActivityScenario<MainActivity> scenario=ActivityScenario.launch(MainActivity.class)){
+            scenario.onActivity(activity->{notice(activity);assertNull(field(activity,"signaling"));});
+        }
+    }
+    @Test public void backgroundDismissesOldDialogAndClearsTheCheckbox(){
+        Dialog[] original={null};
+        try(ActivityScenario<MainActivity> scenario=ActivityScenario.launch(MainActivity.class)){
+            scenario.onActivity(activity->{original[0]=notice(activity);action(original[0],"我已阅读并同意《隐私政策》").performClick();assertTrue(action(original[0],"同意并继续").isEnabled());});
+            scenario.moveToState(Lifecycle.State.CREATED);
+            assertFalse(original[0].isShowing());
+            scenario.moveToState(Lifecycle.State.RESUMED);
+            scenario.onActivity(activity->{Dialog next=notice(activity);assertNotSame(original[0],next);assertFalse(action(next,"同意并继续").isEnabled());assertNull(field(activity,"signaling"));});
+        }
+    }
+    @Test public void agreementPersistsAndStopsAutomaticPrompts(){
+        try(ActivityScenario<MainActivity> scenario=ActivityScenario.launch(MainActivity.class)){
+            scenario.onActivity(activity->{Dialog dialog=notice(activity);agree(activity);assertTrue(preferences.getBoolean("networkConsent",false));assertFalse(dialog.isShowing());assertNotNull(field(activity,"signaling"));});
+            scenario.onActivity(activity->assertNull(field(activity,"privacyDialog")));
+            scenario.moveToState(Lifecycle.State.CREATED).moveToState(Lifecycle.State.RESUMED);
+            scenario.onActivity(activity->assertNull(field(activity,"privacyDialog")));
+        }
+        try(ActivityScenario<MainActivity> scenario=ActivityScenario.launch(MainActivity.class)){
+            scenario.onActivity(activity->assertNull(field(activity,"privacyDialog")));
+            scenario.moveToState(Lifecycle.State.CREATED);
+            preferences.edit().putBoolean("networkConsent",false).commit();
+            scenario.moveToState(Lifecycle.State.RESUMED);
+            scenario.onActivity(activity->{notice(activity);assertNull(field(activity,"signaling"));});
+        }
+    }
+    @Test public void existingLocalRecordsDoNotImplyConsent(){
+        Context context=InstrumentationRegistry.getInstrumentation().getTargetContext();
+        SharedPreferences identities=context.getSharedPreferences("identities",Context.MODE_PRIVATE);
+        String key="privacy-upgrade.invalid:1";
+        try{
+            identities.edit().putString(key,"existing-device-identity").commit();
+            try(ActivityScenario<MainActivity> scenario=ActivityScenario.launch(MainActivity.class)){
+                scenario.onActivity(activity->{notice(activity);assertNull(field(activity,"signaling"));});
+            }
+        }finally{identities.edit().remove(key).commit();}
+    }
+    @Test public void bundledChinesePolicyIsOfflineAndMissingPolicyCannotAuthorize(){
+        Context context=InstrumentationRegistry.getInstrumentation().getTargetContext();
+        PrivacyPolicyDocument policy=new PrivacyPolicyDocument(context);
+        assertTrue(policy.available);assertTrue(policy.text.contains("更新日期："));assertTrue(policy.text.contains("查询与删除请求"));assertFalse(policy.text.contains("## English"));
+        assertFalse(new PrivacyPolicyDocument(" \n").available);
+        try(ActivityScenario<MainActivity> scenario=ActivityScenario.launch(MainActivity.class)){
+            scenario.onActivity(activity->{
+                decline(activity);int[] accepted={0};
+                Dialog missing=new PrivacyConsentDialog(activity,new MobileUi(activity),new PrivacyPolicyDocument((String)null),()->accepted[0]++);
+                try{
+                    missing.show();action(missing,"我已阅读并同意《隐私政策》").performClick();
+                    assertFalse(action(missing,"同意并继续").isEnabled());action(missing,"同意并继续").performClick();
+                    assertEquals(0,accepted[0]);assertFalse(preferences.getBoolean("networkConsent",false));assertNull(field(activity,"signaling"));
+                    action(missing,"暂不同意").performClick();assertFalse(missing.isShowing());
+                }finally{missing.dismiss();}
+            });
+        }
+    }
+}

apps/android/test/android/java/cn/crossdesk/mobile/RecentConnectionPresenceTest.java

@@ -0,0 +1,51 @@
+package cn.crossdesk.mobile;
+
+import org.json.JSONArray;
+import org.json.JSONObject;
+import org.junit.Test;
+import java.util.ArrayList;
+import static org.junit.Assert.*;
+
+public class RecentConnectionPresenceTest {
+    private static JSONArray records(String... ids)throws Exception{
+        JSONArray result=new JSONArray();for(String id:ids)result.put(new JSONObject().put("id",id));return result;
+    }
+    private static JSONObject device(String id,boolean online)throws Exception{return new JSONObject().put("id",id).put("online",online);}
+    private static JSONObject snapshot(JSONObject... devices)throws Exception{
+        JSONArray values=new JSONArray();for(JSONObject device:devices)values.put(device);return new JSONObject().put("type","presence").put("devices",values);
+    }
+    private static JSONObject update(String id,boolean online)throws Exception{return device(id,online).put("type","presence_update");}
+
+    @Test public void snapshotAndUpdatesOnlyAffectWatchedDevicesAndSortStably()throws Exception{
+        RecentConnectionPresence presence=new RecentConnectionPresence();JSONArray history=records("111111111","222222222","333333333");
+        presence.watch(history,0);presence.setConnected(true,0);
+        presence.receive(update("111111111",true),1);assertFalse(presence.isOnline("111111111",1));
+        presence.receive(snapshot(device("222222222",true),device("333333333",true),device("999999999",true)),2);
+        assertFalse(presence.isOnline("999999999",2));assertTrue(presence.isOnline("222222222",2));
+        JSONArray ordered=presence.ordered(history,2);assertEquals("222222222",ordered.getJSONObject(0).getString("id"));assertEquals("333333333",ordered.getJSONObject(1).getString("id"));
+        presence.receive(update("222222222",false),3);assertFalse(presence.isOnline("222222222",3));
+        assertEquals("333333333",presence.ordered(history,3).getJSONObject(0).getString("id"));
+        presence.receive(snapshot(device("111111111",true)),4);assertFalse("A full snapshot replaces missing devices",presence.isOnline("333333333",4));
+    }
+
+    @Test public void refreshExpiryAndReconnectRequireFreshSnapshot()throws Exception{
+        RecentConnectionPresence presence=new RecentConnectionPresence();ArrayList<JSONArray> requests=new ArrayList<>();presence.sender=requests::add;
+        presence.watch(records("111111111"),0);assertTrue(requests.isEmpty());presence.setConnected(true,0);assertEquals(1,requests.size());
+        presence.receive(snapshot(device("111111111",true)),0);presence.maintain(29_999);assertEquals(1,requests.size());
+        presence.maintain(30_000);assertEquals(2,requests.size());assertTrue(presence.isOnline("111111111",59_999));
+        presence.maintain(60_000);assertEquals(3,requests.size());assertFalse(presence.isOnline("111111111",60_000));
+        presence.receive(update("111111111",true),60_001);assertTrue(presence.isOnline("111111111",60_001));
+        presence.setConnected(false,60_002);presence.receive(snapshot(device("111111111",true)),60_003);presence.maintain(120_000);assertEquals(3,requests.size());assertFalse(presence.isOnline("111111111",120_000));
+        presence.setConnected(true,120_001);assertEquals(4,requests.size());presence.receive(update("111111111",true),120_002);assertFalse(presence.isOnline("111111111",120_002));
+        presence.receive(snapshot(device("111111111",true)),120_003);assertTrue(presence.isOnline("111111111",120_003));
+    }
+
+    @Test public void changedHistoryResubscribesAndMalformedStatesDoNotBecomeOnline()throws Exception{
+        RecentConnectionPresence presence=new RecentConnectionPresence();ArrayList<JSONArray> requests=new ArrayList<>();presence.sender=requests::add;
+        presence.watch(records("111111111","111111111"),0);presence.setConnected(true,0);assertEquals(1,requests.get(0).length());
+        presence.receive(snapshot(device("111111111",true)),1);presence.watch(records("222222222"),2);assertEquals(2,requests.size());assertFalse(presence.isOnline("111111111",2));
+        presence.receive(snapshot(new JSONObject().put("id","222222222").put("online","true")),3);assertFalse(presence.isOnline("222222222",3));
+        presence.receive(snapshot(device("222222222",true)),4);presence.receive(new JSONObject().put("type","presence").put("devices","invalid"),5);assertTrue(presence.isOnline("222222222",5));
+        presence.watch(records(),6);assertEquals(0,requests.get(2).length());assertFalse(presence.isOnline("222222222",6));
+    }
+}

apps/android/test/android/java/cn/crossdesk/mobile/RemotePreviewStoreTest.java

@@ -0,0 +1,59 @@
+package cn.crossdesk.mobile;
+
+import android.content.*;
+import android.graphics.*;
+import androidx.test.platform.app.InstrumentationRegistry;
+import org.junit.*;
+import java.io.*;
+import java.nio.file.Files;
+import java.util.*;
+import java.util.concurrent.*;
+import static org.junit.Assert.*;
+
+public class RemotePreviewStoreTest {
+    private Context context;
+    private File root;
+    private SharedPreferences options,index;
+    private String prefix;
+    private RemotePreviewStore store;
+    @Before public void setup()throws Exception{
+        context=InstrumentationRegistry.getInstrumentation().getTargetContext();prefix="preview-test-"+UUID.randomUUID();
+        options=context.getSharedPreferences(prefix,0);index=context.getSharedPreferences(prefix+"-index",0);
+        root=Files.createTempDirectory(context.getCacheDir().toPath(),"previews-").toFile();
+        store=new RemotePreviewStore(new File(root,"images"),options,index);
+    }
+    @After public void cleanup()throws Exception{
+        store.clear();flush();store.io.shutdown();
+        try(var paths=Files.walk(root.toPath())){for(var path:paths.sorted(Comparator.reverseOrder()).toList())Files.delete(path);}
+        context.deleteSharedPreferences(prefix);context.deleteSharedPreferences(prefix+"-index");
+    }
+    private void flush()throws Exception{store.io.submit(()->{}).get(5,TimeUnit.SECONDS);InstrumentationRegistry.getInstrumentation().waitForIdleSync();}
+    private void enable(){options.edit().putBoolean("networkConsent",true).commit();store.setEnabled(true);}
+    private static Bitmap solid(int color){Bitmap image=Bitmap.createBitmap(640,360,Bitmap.Config.ARGB_8888);image.eraseColor(color);return image;}
+    private Bitmap load(String server,String id)throws Exception{
+        var result=new java.util.concurrent.atomic.AtomicReference<Bitmap>();var done=new CountDownLatch(1);
+        store.load(server,id,image->{result.set(image);done.countDown();});assertTrue(done.await(5,TimeUnit.SECONDS));return result.get();
+    }
+    @Test public void offByDefaultAndConsentCannotBeBypassed()throws Exception{
+        assertFalse(store.enabled());assertNull(store.begin("server","1"));store.setEnabled(true);flush();assertFalse(store.enabled());
+        options.edit().putBoolean("networkConsent",true).commit();assertFalse(store.enabled());
+        enable();assertNotNull(store.begin("server","1"));
+        options.edit().putBoolean("networkConsent",false).commit();store.enforceConsent();flush();
+        assertFalse(options.getBoolean(RemotePreviewStore.OPTION,true));assertNull(store.begin("server","1"));
+    }
+    @Test public void jpegPersistsAcrossStoreRecreationAndRemainsServerScoped()throws Exception{
+        enable();var capture=store.begin("server:1","123456789");store.save(capture,solid(Color.GREEN));flush();
+        assertTrue(new File(store.directory,capture.key+".jpg").isFile());
+        assertNull(load("server:2","123456789"));assertNull(load("server:1","other"));
+        store.io.shutdown();store=new RemotePreviewStore(store.directory,options,index);
+        Bitmap loaded=load("server:1","123456789");assertNotNull(loaded);assertEquals(640,loaded.getWidth());assertEquals(360,loaded.getHeight());assertTrue(Color.green(loaded.getPixel(320,180))>240);loaded.recycle();
+    }
+
+    @Test public void disablingDeletesFilesAndInvalidatesInFlightCapture()throws Exception{
+        enable();var capture=store.begin("server","1");store.save(capture,solid(Color.BLUE));flush();
+        store.setEnabled(false);store.save(capture,solid(Color.RED));flush();
+        assertFalse(store.enabled());assertFalse(store.directory.exists());assertTrue(index.getAll().isEmpty());assertNull(load("server","1"));
+        store.setEnabled(true);assertNull(load("server","1"));
+    }
+
+}

apps/android/test/android/java/cn/crossdesk/mobile/RemoteVersionCheckTest.java

@@ -0,0 +1,64 @@
+package cn.crossdesk.mobile;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import org.json.JSONObject;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Consumer;
+import static org.junit.Assert.*;
+
+@RunWith(AndroidJUnit4.class)
+public class RemoteVersionCheckTest {
+    private static byte[] json(String value) { return value.getBytes(StandardCharsets.UTF_8); }
+    private static JSONObject host(Object version) {
+        try { return new JSONObject().put("app_version", version); }
+        catch (Exception error) { throw new AssertionError(error); }
+    }
+    private static final class Fetches implements RemoteVersionCheck.Fetcher {
+        final List<Consumer<byte[]>> replies = new ArrayList<>();
+        int cancellations;
+        public RemoteVersionCheck.Cancellation fetch(Consumer<byte[]> reply) {
+            replies.add(reply);
+            return () -> cancellations++;
+        }
+    }
+
+    @Test public void sharedNativeComparisonMatchesIosReleaseOrdering() {
+        byte[] release = json("{\"latest_version\":\"v1.5.3-20260928\",\"patch\":2}");
+        for (String version : new String[]{"1.5.2", "v1.5.3-20260928", "1.5.3-1-20260929", "1.5.3-20260928-1"}) {
+            assertTrue(NativeSession.nValidAppVersion(version));
+            assertTrue(version, NativeSession.nHasAppUpdate(version, release));
+        }
+        for (String version : new String[]{"1.5.3-2-20260927", "1.5.3-3-20260928", "1.6.0"})
+            assertFalse(version, NativeSession.nHasAppUpdate(version, release));
+        assertFalse(NativeSession.nHasAppUpdate("1.5.3-20260927", json("{\"version\":\"1.5.3-20261001\"}")));
+        assertTrue(NativeSession.nHasAppUpdate("1.5.3-9", json("{\"version\":\"1.5.3\",\"patch\":\"10\"}")));
+    }
+
+    @Test public void legacyVersionWaitsForConnectionAndNeverFetches() {
+        for (Object version : new Object[]{null, JSONObject.NULL, 123, "", " ", "unknown", "ios-native", "1..5", "1.5-"}) {
+            Fetches fetches = new Fetches(); int[] notices = {0};
+            RemoteVersionCheck check = new RemoteVersionCheck(fetches, () -> notices[0]++);
+            check.hostInfo(host(version)); assertEquals(0, notices[0]);
+            check.connected(); assertEquals(1, notices[0]);
+            check.hostInfo(host(version)); check.connected(); assertEquals(1, notices[0]);
+            assertTrue(fetches.replies.isEmpty()); check.reset();
+        }
+    }
+
+    @Test public void disconnectCancelsAndOldReplyCannotAffectANewPeer() {
+        Fetches fetches = new Fetches(); int[] notices = {0};
+        RemoteVersionCheck check = new RemoteVersionCheck(fetches, () -> notices[0]++);
+        check.hostInfo(host("1.0.0")); check.connected(); check.reset();
+        assertEquals(1, fetches.cancellations);
+        fetches.replies.get(0).accept(json("{\"version\":\"2.0.0\"}")); assertEquals(0, notices[0]);
+        check.connected(); check.hostInfo(host("3.0.0"));
+        fetches.replies.get(0).accept(json("{\"version\":\"2.0.0\"}"));
+        fetches.replies.get(1).accept(json("{\"version\":\"2.0.0\"}")); assertEquals(0, notices[0]);
+        check.reset(); assertEquals(1, fetches.cancellations);
+    }
+
+}

apps/android/test/android/java/cn/crossdesk/mobile/RemoteViewportTest.java

@@ -0,0 +1,129 @@
+package cn.crossdesk.mobile;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import static org.junit.Assert.*;
+
+/** Non-UI regression checks for zoom and remote input geometry. */
+@RunWith(AndroidJUnit4.class)
+public class RemoteViewportTest {
+    private static final float EPSILON = .0001f;
+
+    @Test public void fittedVideoRejectsLetterboxingAndMapsItsEdges() {
+        RemoteViewport viewport = new RemoteViewport();
+        viewport.fit(1080,1920,1920,1080);
+        assertEquals(1080,viewport.baseWidth());
+        assertEquals(607,viewport.baseHeight());
+        assertEquals(656,viewport.top(),EPSILON);
+        assertFalse(viewport.contains(540,200));
+        assertTrue(viewport.contains(0,656));
+        assertFalse(viewport.contains(1080,1263));
+        assertEquals(.5f,viewport.normalizedX(540),EPSILON);
+        assertEquals(.5f,viewport.normalizedY(959.5f),EPSILON);
+    }
+
+    @Test public void pinchKeepsTheRemotePointUnderAnOffCenterFocus() {
+        RemoteViewport viewport = new RemoteViewport();
+        viewport.fit(1000,600,1000,600);
+        viewport.zoomBy(2,750,350);
+        assertEquals(2,viewport.scale(),EPSILON);
+        assertEquals(-250,viewport.offsetX(),EPSILON);
+        assertEquals(-50,viewport.offsetY(),EPSILON);
+        assertEquals(.75f,viewport.normalizedX(750),EPSILON);
+        assertEquals(350f/600,viewport.normalizedY(350),EPSILON);
+        viewport.zoomBy(.5f,750,350);
+        assertEquals(1,viewport.scale(),EPSILON);
+        assertEquals(0,viewport.offsetX(),EPSILON);
+        assertEquals(0,viewport.offsetY(),EPSILON);
+    }
+
+    @Test public void zoomAndPanUseTheSameInverseTransformForRemoteInput() {
+        RemoteViewport viewport = new RemoteViewport();
+        viewport.fit(1200,800,1920,1080);
+        viewport.zoomBy(3,600,399.5f);
+        viewport.panBy(200,100);
+        assertEquals(-1000,viewport.left(),EPSILON);
+        assertEquals(-513,viewport.top(),EPSILON);
+        assertEquals(1380f/3600,viewport.normalizedX(380),EPSILON);
+        assertEquals(.28f,viewport.normalizedY(54),EPSILON);
+        // Trackpad deltas use the zoomed dimensions, too.
+        assertEquals(.01f,36/viewport.width(),EPSILON);
+        assertEquals(.01f,20.25f/viewport.height(),EPSILON);
+    }
+
+    @Test public void panCannotMoveTheImagePastTheOriginalFittedArea() {
+        RemoteViewport viewport = new RemoteViewport();
+        viewport.fit(1000,800,1600,900);
+        viewport.zoomBy(2,500,400);
+        viewport.panBy(10000,-10000);
+        assertEquals(500,viewport.offsetX(),EPSILON);
+        assertEquals(-281,viewport.offsetY(),EPSILON);
+        assertEquals(0,viewport.left(),EPSILON);
+        assertEquals(119,viewport.top()+viewport.height()-viewport.baseHeight(),EPSILON);
+        viewport.panBy(-20000,20000);
+        assertEquals(-500,viewport.offsetX(),EPSILON);
+        assertEquals(281,viewport.offsetY(),EPSILON);
+    }
+
+    @Test public void scaleMatchesIosLimitsAndFinishingNearOneRestoresFit() {
+        RemoteViewport viewport = new RemoteViewport();
+        viewport.fit(1000,600,1000,600);
+        viewport.zoomBy(100,500,300);
+        assertEquals(10,viewport.scale(),EPSILON);
+        viewport.zoomBy(.10005f,500,300);
+        viewport.panBy(.1f,.1f);
+        viewport.finishGesture();
+        assertEquals(1,viewport.scale(),EPSILON);
+        assertEquals(0,viewport.offsetX(),EPSILON);
+        assertEquals(0,viewport.offsetY(),EPSILON);
+        assertFalse(viewport.isZoomed());
+        viewport.zoomBy(.01f,500,300);
+        assertEquals(1,viewport.scale(),EPSILON);
+    }
+
+    @Test public void rotationAndResolutionChangesConstrainExistingPan() {
+        RemoteViewport viewport = new RemoteViewport();
+        viewport.fit(1000,600,1000,600);
+        viewport.zoomBy(2,500,300);
+        viewport.panBy(500,300);
+        viewport.fit(600,1000,1000,600);
+        assertEquals(2,viewport.scale(),EPSILON);
+        assertEquals(300,viewport.offsetX(),EPSILON);
+        assertEquals(180,viewport.offsetY(),EPSILON);
+        viewport.fit(600,1000,600,1000);
+        assertEquals(2,viewport.scale(),EPSILON);
+        assertEquals(1000,viewport.baseHeight());
+        viewport.reset();
+        assertEquals(1,viewport.scale(),EPSILON);
+        assertEquals(0,viewport.offsetX(),EPSILON);
+        assertEquals(0,viewport.offsetY(),EPSILON);
+    }
+
+    @Test public void oddMarginsShareTheActualSurfaceCenterAtMaximumZoom() {
+        RemoteViewport viewport = new RemoteViewport();
+        viewport.fit(801,603,800,600);
+        assertEquals(801,viewport.baseWidth());
+        assertEquals(600,viewport.baseHeight());
+        assertEquals(1,viewport.top(),EPSILON);
+        viewport.zoomBy(10,400.5f,301);
+        assertEquals(-3604.5f,viewport.left(),EPSILON);
+        assertEquals(-2699,viewport.top(),EPSILON);
+        assertEquals(.5f,viewport.normalizedX(400.5f),EPSILON);
+        assertEquals(.5f,viewport.normalizedY(301),EPSILON);
+    }
+
+    @Test public void invalidGeometryAndScaleDoNotCorruptViewport() {
+        RemoteViewport viewport = new RemoteViewport();
+        viewport.fit(0,0,1920,1080);
+        assertFalse(viewport.contains(0,0));
+        viewport.zoomBy(2,0,0);
+        assertEquals(1,viewport.scale(),EPSILON);
+        viewport.fit(1000,600,1000,600);
+        viewport.zoomBy(Float.NaN,500,300);
+        viewport.zoomBy(Float.POSITIVE_INFINITY,500,300);
+        viewport.zoomBy(-1,500,300);
+        assertEquals(1,viewport.scale(),EPSILON);
+        assertEquals(0,viewport.offsetX(),EPSILON);
+    }
+}

apps/android/test/android/java/cn/crossdesk/mobile/TlsTrustTest.java

@@ -0,0 +1,63 @@
+package cn.crossdesk.mobile;
+
+import android.content.Context;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.platform.app.InstrumentationRegistry;
+import org.json.JSONObject;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import java.io.*;
+import java.lang.reflect.*;
+import java.net.InetAddress;
+import java.nio.file.Files;
+import java.security.KeyStore;
+import java.util.concurrent.*;
+import javax.net.ssl.*;
+import static org.junit.Assert.*;
+
+/** Exercises the actual MiniRTC TLS path inside an Android app process (AT_SECURE=1).
+ * The bundled PKCS12 keys are public test fixtures, only served on loopback. No
+ * websocket upgrade/login or external server is involved in these tests. */
+@RunWith(AndroidJUnit4.class)
+public class TlsTrustTest {
+    @Test public void explicitlyTrustedCertificateCompletesHandshake() throws Exception {
+        assertTrue("The app must load the supplied trust bundle despite AT_SECURE", handshake("valid",true));
+    }
+    @Test public void untrustedCertificateIsRejected() throws Exception {
+        assertFalse("A test CA absent from the system store must not be trusted",handshake("valid",false));
+    }
+    @Test public void certificateForAnotherHostIsRejected() throws Exception {
+        assertFalse("Trusting the CA must not bypass hostname verification",handshake("wrong-host",true));
+    }
+    private boolean handshake(String certificate,boolean trustFixture) throws Exception {
+        var instrumentation=InstrumentationRegistry.getInstrumentation();Context context=instrumentation.getTargetContext();
+        KeyStore keyStore=KeyStore.getInstance("PKCS12");char[] password="local-test-only".toCharArray();
+        try(InputStream input=instrumentation.getContext().getAssets().open("tls/"+certificate+".p12")){keyStore.load(input,password);}
+        KeyManagerFactory keys=KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());keys.init(keyStore,password);
+        SSLContext tls=SSLContext.getInstance("TLS");tls.init(keys.getKeyManagers(),null,null);
+        ExecutorService serverWorker=Executors.newSingleThreadExecutor();
+        NativeSession session=new NativeSession(context,"127.0.0.1",1,"unused","unused",new NativeSession.Listener(){
+            public void status(String value){} public void connected(){fail("Test server never opens a desktop session");}
+            public void ended(String value){} public void data(JSONObject value){}public void videoSize(int w,int h){}
+            public void clipboard(String value){}public void statistics(RemoteNetworkStatistics.Snapshot value){}
+        });
+        File roots=new File(context.getCacheDir(),"tls-test-roots.pem");
+        Field rtcField=NativeSession.class.getDeclaredField("RTC");rtcField.setAccessible(true);ExecutorService rtc=(ExecutorService)rtcField.get(null);
+        try(SSLServerSocket server=(SSLServerSocket)tls.getServerSocketFactory().createServerSocket(0,1,InetAddress.getByName("127.0.0.1"))){
+            server.setSoTimeout(10000);
+            if(trustFixture){try(InputStream input=instrumentation.getContext().getAssets().open("tls/root.pem")){Files.copy(input,roots.toPath(),java.nio.file.StandardCopyOption.REPLACE_EXISTING);}}
+            else{Method export=NativeSession.class.getDeclaredMethod("exportTrust");export.setAccessible(true);File systemRoots=(File)export.invoke(session);Files.copy(systemRoots.toPath(),roots.toPath(),java.nio.file.StandardCopyOption.REPLACE_EXISTING);}
+            Future<Boolean> request=serverWorker.submit(()->{
+                try(SSLSocket socket=(SSLSocket)server.accept()){
+                    socket.setSoTimeout(10000);socket.startHandshake();
+                    String first=new BufferedReader(new InputStreamReader(socket.getInputStream(),java.nio.charset.StandardCharsets.US_ASCII)).readLine();
+                    return first!=null&&first.startsWith("GET ");
+                }catch(SSLException expected){return false;}
+            });
+            Method create=NativeSession.class.getDeclaredMethod("nCreate",NativeSession.class,String.class,int.class,String.class,String.class,String.class);create.setAccessible(true);
+            Field handle=NativeSession.class.getDeclaredField("handle");handle.setAccessible(true);
+            rtc.submit(()->{try{long value=(long)create.invoke(null,session,"127.0.0.1",server.getLocalPort(),"",context.getCacheDir().getAbsolutePath(),roots.getAbsolutePath());handle.setLong(session,value);assertNotEquals(0L,value);}catch(ReflectiveOperationException error){throw new RuntimeException(error);}}).get(10,TimeUnit.SECONDS);
+            return request.get(15,TimeUnit.SECONDS);
+        }finally{session.close();rtc.submit(()->{}).get(10,TimeUnit.SECONDS);serverWorker.shutdownNow();roots.delete();}
+    }
+}

apps/android/test/android/java/cn/crossdesk/mobile/VideoSettingsTest.java

@@ -0,0 +1,22 @@
+package cn.crossdesk.mobile;
+
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+public class VideoSettingsTest {
+    private final RemoteVideoSettings.Values first=new RemoteVideoSettings.Values(1,30,2),second=new RemoteVideoSettings.Values(0,60,1);
+    private void same(RemoteVideoSettings.Values expected,RemoteVideoSettings.Values actual){assertEquals(expected.quality,actual.quality);assertEquals(expected.frameRate,actual.frameRate);assertEquals(expected.preference,actual.preference);}
+
+    @Test public void acknowledgementCommitsAndRejectionRollsBack(){
+        RemoteVideoSettings state=new RemoteVideoSettings(1);state.setSupported(true);long id=state.begin(first);assertTrue(state.pending);same(new RemoteVideoSettings.Values(1,30,1),state.applied);
+        state.receive(first,id,true);same(first,state.selection);assertFalse(state.pending);assertFalse(state.failed);state.expire(id);assertFalse(state.failed);
+        id=state.begin(second);state.receive(second,id,false);same(first,state.selection);assertTrue(state.failed);state.begin(second);assertFalse(state.failed);
+    }
+
+    @Test public void timeoutLateReplyAndCapabilityLoss(){
+        RemoteVideoSettings state=new RemoteVideoSettings(1);state.setSupported(true);long id=state.begin(first);state.expire(id);assertTrue(state.failed);same(new RemoteVideoSettings.Values(1,30,1),state.selection);
+        state.receive(first,id,true);same(first,state.selection);assertFalse(state.failed);
+        id=state.begin(second);state.setSupported(false);state.receive(second,id,true);state.expire(id);same(first,state.selection);assertFalse(state.failed);assertFalse(state.pending);
+    }
+
+}

apps/android/test/native/controller_protocol_test.cpp

@@ -0,0 +1,39 @@
+#include "controller_protocol.h"
+#include <cassert>
+#include <cmath>
+#include <limits>
+
+int main() {
+  using namespace crossdesk;
+  for (int quality = -1; quality <= 3; ++quality)
+    for (int rate : {0, 24, 30, 60, 120})
+      for (int preference = -1; preference <= 3; ++preference) {
+        const auto message = android_controller::VideoSettingsMessage(quality, rate, preference, UINT32_MAX);
+        const bool valid = quality >= 0 && quality <= 2 && (rate == 30 || rate == 60) && preference >= 0 && preference <= 2;
+        assert(message.empty() != valid);
+        if (!valid) continue;
+        // Decode the actual Android outgoing message with the desktop's wire parser.
+        RemoteAction desktop{};
+        assert(desktop.from_json(message) && desktop.type == video_settings);
+        assert(desktop.vs.quality == quality && desktop.vs.frame_rate == rate && desktop.vs.preference == preference);
+        assert(desktop.vs.request_id == UINT32_MAX && !desktop.vs.accepted);
+        desktop.type = video_settings_status; desktop.vs.accepted = true;
+        RemoteAction reply{}; assert(reply.from_json(desktop.to_json()));
+        assert(reply.type == video_settings_status && reply.vs.accepted && reply.vs.request_id == UINT32_MAX);
+      }
+  MiniRtcNetTrafficStats stats{};
+  stats.video_inbound_stats.bitrate = 8'000'000; stats.video_inbound_stats.loss_rate = .02f;
+  stats.audio_inbound_stats.bitrate = 64'000; stats.audio_outbound_stats.bitrate = 128'000;
+  stats.data_inbound_stats.bitrate = 2000; stats.data_outbound_stats.bitrate = 3000;
+  stats.total_inbound_stats.bitrate = UINT32_MAX; stats.total_outbound_stats.bitrate = 131'000;
+  stats.total_inbound_stats.loss_rate = 1.2f; stats.rtt_ms = 40; stats.srtp_active = true;
+  auto json = android_controller::NetworkReport(stats, Relay);
+  assert(json.at("mode") == 1 && json.at("srtp") == true && json.at("rtt") == 40);
+  assert(json.at("video").at("inbound") == 8'000'000 && json.at("audio").at("outbound") == 128'000);
+  assert(json.at("data").at("inbound") == 2000 && json.at("data").at("outbound") == 3000);
+  assert(json.at("total").at("inbound").get<uint32_t>() == UINT32_MAX);
+  assert(std::abs(json.at("total").at("loss").get<double>() - 1.2) < .001);
+  stats.rtt_ms = -1; stats.srtp_active = false;
+  json = android_controller::NetworkReport(stats, UnknownMode);
+  assert(json.at("mode") == 2 && json.at("srtp") == false && json.at("rtt") == -1);
+}

apps/android/test/native/video_pipeline_test.cpp

@@ -0,0 +1,84 @@
+#include "latest_frame_worker.h"
+#include "video_timing.h"
+#include "video_picture.h"
+#include <cassert>
+#include <chrono>
+#include <future>
+#include <memory>
+#include <vector>
+
+int main() {
+  using namespace crossdesk::android_controller;
+  using namespace std::chrono_literals;
+  assert(VideoLatencyMilliseconds(1'000'000, 1'020'000, 1'050'000) == 50);
+  // Reproduce a valid frame delayed in the local decode/Surface queue.
+  // The old submission-time five-second cutoff hid both of these samples.
+  assert(VideoLatencyMilliseconds(1'000'000, 1'020'000, 7'000'000) == 6000);
+  assert(VideoLatencyMilliseconds(1'000'000, 1'020'000, 31'000'000) == 30000);
+  assert(VideoLatencyMilliseconds(0, 1'020'000, 7'000'000) < 0);
+  assert(VideoLatencyMilliseconds(1'030'000, 1'020'000, 7'000'000) < 0);
+  assert(VideoLatencyMilliseconds(1'000'000, 6'000'001, 7'000'000) < 0);
+  assert(VideoLatencyMilliseconds(1'000'000, 1'020'000, 1'010'000) < 0);
+  assert(VideoLatencyMilliseconds(1'000'000, 1'020'000, -1) < 0);
+
+  struct Owner { int references = 1; uint8_t pixels[12]{}; } owner;
+  MiniRtcNativeVideoFrame native{};
+  native.struct_size = sizeof(native); native.type = MiniRtcNativeVideoFrameCpuNv12;
+  native.width = native.height = 2; native.owner = &owner;
+  native.retain = [](void* p) { ++static_cast<Owner*>(p)->references; };
+  native.release = [](void* p) { --static_cast<Owner*>(p)->references; };
+  native.payload.cpu_nv12 = {owner.pixels, owner.pixels + 8, 4, 4};
+  MiniRtcVideoFrame source{}; source.width = source.height = 2;
+  source.native_frame = &native; source.captured_timestamp = 100; source.received_timestamp = 120;
+  {
+    auto retained = VideoPicture::RetainOrCopy(source, 3);
+    assert(retained && owner.references == 2 && retained->pixels.empty());
+    assert(retained->Y() == owner.pixels && retained->UV() == owner.pixels + 8);
+    assert(retained->YStride() == 4 && retained->UVStride() == 4);
+    assert(retained->captured_us == 100 && retained->received_us == 120 && retained->generation == 3);
+    auto moved = std::move(*retained); retained.reset(); assert(owner.references == 2);
+  }
+  assert(owner.references == 1);
+  uint8_t borrowed[6]{1, 2, 3, 4, 5, 6};
+  source.native_frame = nullptr; source.data = reinterpret_cast<const char*>(borrowed); source.size = 6;
+  auto copied = VideoPicture::RetainOrCopy(source, 4); borrowed[0] = 0;
+  assert(copied && copied->Y()[0] == 1 && copied->UV()[0] == 5 && copied->YStride() == 2);
+  source.size = 5; assert(!VideoPicture::RetainOrCopy(source, 4));
+  source.width = 3; assert(!VideoPicture::RetainOrCopy(source, 4));
+
+  std::promise<void> started, release, finished;
+  auto released = release.get_future();
+  std::vector<int> rendered;
+  LatestFrameWorker<std::unique_ptr<int>> worker([&](std::unique_ptr<int> value) {
+    rendered.push_back(*value);
+    if (*value == 1) { started.set_value(); released.wait(); }
+    if (*value == 4) finished.set_value();
+  });
+  assert(worker.Submit(std::make_unique<int>(1)));
+  assert(started.get_future().wait_for(2s) == std::future_status::ready);
+  // A blocked Surface must not block frame submission; obsolete frames 2/3
+  // must not be displayed after it recovers, even with move-only ownership.
+  assert(worker.Submit(std::make_unique<int>(2)));
+  assert(worker.Submit(std::make_unique<int>(3)));
+  assert(worker.Submit(std::make_unique<int>(4)));
+  release.set_value();
+  assert(finished.get_future().wait_for(2s) == std::future_status::ready);
+  worker.Stop();
+  assert((rendered == std::vector<int>{1, 4}));
+  assert(!worker.Submit(std::make_unique<int>(5)));
+  worker.Stop();
+
+  std::promise<void> first_started, first_release;
+  auto first_released = first_release.get_future();
+  int count = 0;
+  LatestFrameWorker<int> cleared([&](int value) {
+    ++count; assert(value == 1); first_started.set_value(); first_released.wait();
+  });
+  cleared.Submit(1);
+  assert(first_started.get_future().wait_for(2s) == std::future_status::ready);
+  cleared.Submit(2);
+  cleared.Clear(); // Surface replacement/display switch discards pending pixels.
+  first_release.set_value();
+  cleared.Stop();
+  assert(count == 1);
+}

apps/android/test/run_native.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+"""Check Android's native packets against the shared desktop wire parser."""
+import os
+from pathlib import Path
+import subprocess
+import tempfile
+
+ANDROID = Path(__file__).resolve().parents[1]
+ROOT = ANDROID.parents[1]
+headers = list((ANDROID / '.native/packages/n/nlohmann_json').glob('*/**/include/nlohmann/json.hpp'))
+if not headers:
+    raise SystemExit('Build the Android app first to populate its pinned native dependencies.')
+with tempfile.TemporaryDirectory(prefix='crossdesk-android-protocol-') as temporary:
+    binary = Path(temporary) / 'controller-protocol-test'
+    subprocess.run([os.environ.get('CXX', 'c++'), '-std=c++17',
+                    '-I' + str(headers[0].parents[1]),
+                    '-I' + str(ANDROID / 'native'),
+                    '-I' + str(ROOT / 'deps/submodules/minirtc/src/api'),
+                    '-I' + str(ROOT / 'libs/wire/include'),
+                    str(ANDROID / 'test/native/controller_protocol_test.cpp'),
+                    str(ROOT / 'libs/wire/src/remote_action.cpp'), '-o', str(binary)], check=True)
+    subprocess.run([str(binary)], check=True)
+    video_test = Path(temporary) / 'video-pipeline-test'
+    subprocess.run([os.environ.get('CXX', 'c++'), '-std=c++17', '-pthread',
+                    '-I' + str(ANDROID / 'native'),
+                    '-I' + str(ROOT / 'deps/submodules/minirtc/src/api'),
+                    str(ANDROID / 'test/native/video_pipeline_test.cpp'),
+                    '-o', str(video_test)], check=True)
+    subprocess.run([str(video_test)], check=True, timeout=10)
+print('PASS: Android video settings / desktop wire round-trip and native network fields')
+print('PASS: long video latency, invalid clocks, latest-frame rendering and shutdown')

apps/android/test/verify_apk.py

@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+"""Check the shipped native ABI, ELF load alignment and APK zip alignment."""
+from pathlib import Path
+import hashlib
+import json
+import struct
+import sys
+import zipfile
+
+
+def verify(path):
+    with zipfile.ZipFile(path) as archive, open(path, 'rb') as raw:
+        libraries = [i for i in archive.infolist() if i.filename.endswith('.so')]
+        if [i.filename for i in libraries] != ['lib/arm64-v8a/libcrossdesk_android.so']:
+            raise ValueError('APK must contain exactly the arm64 native controller library')
+        library = libraries[0]
+        data = archive.read(library)
+        if data[:6] != b'\x7fELF\x02\x01' or struct.unpack_from('<H', data, 18)[0] != 183:
+            raise ValueError('Native library is not little-endian ELF64 AArch64')
+        offset = struct.unpack_from('<Q', data, 32)[0]
+        size, count = struct.unpack_from('<HH', data, 54)
+        segments = [struct.unpack_from('<IIQQQQQQ', data, offset + i * size) for i in range(count)]
+        loads = [s for s in segments if s[0] == 1]
+        if not loads or any(s[7] < 16384 or (s[2] - s[3]) % 16384 for s in loads):
+            raise ValueError('ELF PT_LOAD segments must be aligned to at least 16 KB')
+        if library.compress_type != zipfile.ZIP_STORED:
+            raise ValueError('Native library must be stored uncompressed')
+        raw.seek(library.header_offset + 26)
+        name, extra = struct.unpack('<HH', raw.read(4))
+        if (library.header_offset + 30 + name + extra) % 16384:
+            raise ValueError('APK native library entry is not 16 KB aligned')
+        if 'assets/THIRD_PARTY_NOTICES.txt' not in archive.namelist():
+            raise ValueError('Missing third-party notices')
+        if archive.read('assets/PRIVACY.md') != (Path(__file__).resolve().parents[3] / 'PRIVACY.md').read_bytes():
+            raise ValueError('Missing or outdated bundled privacy policy')
+        catalog = json.loads(archive.read('assets/ThirdPartyLicenses.json'))
+        source = json.loads(archive.read('assets/SourceMetadata.json'))
+        components = catalog['components']
+        ids = [item['id'] for item in components]
+        if catalog['schemaVersion'] != 1 or len(ids) != len(set(ids)) or not {
+                'crossdesk', 'minirtc', 'openfec', 'openh264', 'libiconv', 'android-ndk', 'svt-av1'}.issubset(ids):
+            raise ValueError('Incomplete About catalog')
+        for component in components:
+            if not component['documents']:
+                raise ValueError('Missing component documents')
+            for document in component['documents']:
+                text = archive.read('assets/'+document['asset'])
+                if not text or hashlib.sha256(text).hexdigest() != document['sha256']:
+                    raise ValueError('Incomplete license document: '+document['asset'])
+            for document in component.get('buildDocuments', []):
+                if not archive.read('assets/'+document['asset']):
+                    raise ValueError('Missing build document')
+        if source['schemaVersion'] != 1 or len(source['revision']) != 40:
+            raise ValueError('Missing source revision')
+        for document in source['buildDocuments']:
+            if not archive.read('assets/'+document['asset']):
+                raise ValueError('Missing source build instructions')
+    print(f'PASS: {Path(path).name}: arm64, 16 KB ELF/ZIP alignment, privacy policy, notices, About catalog and documents')
+
+
+if __name__ == '__main__':
+    verify(sys.argv[1])

apps/desktop/resources/windows/crossdesk.manifest

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+
+  <assemblyIdentity
+      version="1.0.0.0"
+      name="CrossDesk"
+      type="win32" />
+
+  <description>CrossDesk Application</description>
+
+  <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
+    <security>
+      <requestedPrivileges>
+        <requestedExecutionLevel level="requireAdministrator" uiAccess="false"/>
+      </requestedPrivileges>
+    </security>
+  </trustInfo>
+
+  <application xmlns="urn:schemas-microsoft-com:asm.v3">
+    <windowsSettings>
+      <dpiAware xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">true/pm</dpiAware>
+      <dpiAwareness xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">PerMonitorV2</dpiAwareness>
+    </windowsSettings>
+  </application>
+
+  <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
+    <application>
+      <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}"/>
+    </application>
+  </compatibility>
+
+</assembly>